Malicious PDF — malware analysis report

Static analysis result for SHA-256 5385e5f0f5c6d51d…

MALICIOUS

PDF

93.8 KB Created: 2021-07-13 02:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9b34201148d9ee3afbb518cb474c98b8 SHA-1: aa49b53c52eb1994f2f1c97c7976ddaa7a2a39a6 SHA-256: 5385e5f0f5c6d51d8a66f64bcae6e2ccd425d22600a1b773148cf3aa3aabda47
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a fake CAPTCHA lure and a password-protected archive lure. It contains numerous links to potentially compromised WordPress sites, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow designed to deceive the user into downloading a payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/50juh0dkjktf1pf2a82hh95qis/munatudajufiref.pdf In PDF document text
    • http://patriabrno.cz/userfiles/files/72189534586.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/99405511200.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/7d016b53fe79ccb6fc623864db591b90/nagaforisibumiduzumi.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105060923258938.pdfIn PDF document text
    • http://toonesk.com/upload/kojefalunusabagovazegu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f761a19997---52934507788.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/23204175579.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4960798522cc0f154bb55d2d400affb0/debedojenosiv.pdfIn PDF document text
    • https://vientangluc.com/upload/files/86249918951.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cda69e9f151---livajawavifuzamutevuzoge.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/gumalinomip.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gi0rfdh5s2eqf1hl23ln01j8a7/16803969477.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/6f006785c1fff7719f0795f509dbf4ce/tawin.pdfIn PDF document text
    • http://accronline.com/userfiles/file/pedutafagonitibumipiw.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0281bf4a4---nodeke.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b40c09774b4bb530e167d00ab35b3283/55115344949.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7urn7k80lckudsshi609v695t4/dafat.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087edc91a4da---mexavesejosavonakaki.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/35672352707.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8502089461---86618834172.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/nomabulagajemotilowovi.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4ffa78466876bc2366e429890055e818/dubunefaguzimi.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/mt7d16qfnst2lmtgvgsv4t5mfe/tagotuxepe.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/60689662603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+wwe+2k20+on+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 10396 bytes
SHA-256: b1acb80076f1527c50cd5626833c583a27980cf15ae5d54ac0bdabdcb18500dc
font_01_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 17716 bytes
SHA-256: 798a26bc2b7e3f2989f6130c429072af3de88d8dab723086fd8b1c71dae88a2d
font_03_sfnt_off00014ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF4 17064 bytes
SHA-256: 5c39dddf17fdca3bb2aa26d63473a832aba52f81d9d6156b4a846c192ac41c77

Open this report in the interactive analyzer, or submit your own file for analysis.