Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e26d1e37d8e2e4…

MALICIOUS

PDF

86.2 KB Created: 2021-08-15 22:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a0d17855413087b08d4422ab2736fba6 SHA-1: 3bc30caa0565bf298f8847731a8cf57fdc16043a SHA-256: 20e26d1e37d8e2e483f5f37c3e9ab92cddc1e1c33254ec8adb97d4f463e737b7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to deceive the user into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and heuristics suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://provia-events.de/pics/fotos/1/file/dugonopinune.pdf In PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ee1f45fab---mobelefojun.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a1b37853---rasamekazizalek.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9927f7e214683fcdd25f5ec9ef40f4f9/kusawazidimid.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c164ab4a36---33946551141.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/uupje9kp6cnlk0tcoh91anojra/sonutinumazozomon.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/37b5d9d348f2d2695ef189e77e9d127a/61987710365.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/b6a6f607457fc2916bef23226ec98d8f/dipexumubozitiwaveworag.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/bedaxotekifilerikigij.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/nutediburisonodojixiguzud.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c949cb9227---22348768434.pdfIn PDF document text
    • https://vestol.bg/files/file/59613079364.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/vi91cisdk5ihbmgkgjf9p1sck7/260013649.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/d9c25ecde789aabbfb514155fda7b521/14921040395.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/29365372765.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/69242044124.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/gaxubosajosim.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca102eaa38---23357887016.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/7253144075.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/22857517698.pdfIn PDF document text
    • https://roc.mn/uploads/files/naxefok.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/e44e98506a5bf03ec580c44c7f645dca/juzixipale.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/330b49736f0ee42b1780125a3d12d9ac/bemowopujonusebavapovux.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/6a1cefe562951e2f196e61f4acdd5970/sekamovuxifare.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97b5a502ab---dafuvujuroselobupevowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+enter+hack+cheats+harry+potter+hogwarts+mystery+2020PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 11208 bytes
SHA-256: 1c03c3c23780919227c66df8978f72d1eea6b55961ee54192644f57a2170ae45
font_01_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 17264 bytes
SHA-256: 6e93e9453564f2bdbe40da1b353f88786b6cbc2c3fd6d1e34f0b1220d17e3fb7

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