Malicious PDF — malware analysis report

Static analysis result for SHA-256 e682017d0a71409f…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 21:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: faaa5fd0690a73ae2a8fe3559f625085 SHA-1: af449bf9cdba693a6bebd386deabdbdf25c3e9f8 SHA-256: e682017d0a71409f4c6ed98f9cc5b4e8c03c1ec6504208cec639cb4fe0927a46
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV also detecting it as a phishing trojan. The file contains numerous links to compromised websites, suggesting it is part of a phishing campaign. The presence of a 'download button' lure further supports this, indicating the document's intent is to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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 https://crewmak.ru/uplcv?utm_term=how+to+uninstall+workspace+android PDF link annotation
    • http://mebelhotel.ru/images/news/file/nukatip.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/97g7ncgmh9m10lmu2j0iqbq6fu/gujajidepudij.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8fcb5fbac4e9b18eaeb29d1ab7900361/2591787148.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/1337f0e99427d6470becda172329c1f7/siniginenewapik.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/12235601069.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/sozirubumojesuvediwob.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/05ae175f5140df9b8ae84b0893597c84/74972656260.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/14f1s2l96msi8m7a1f0dl9n62d/15285600703.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/44596050242.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1613efabef0cad---rilarusekut.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/borekawaziwoputi.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/78177659002.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/39783311375.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109110944152536.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/72171553240.pdfIn PDF document text
    • http://www.og2c.com/images/file/12422732150.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/kuvaxekukudokoferuzi.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/rakeziwukon.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/4671813360.pdfIn PDF document text
    • http://dentherapia.hu/files/file/timibuluvunosara.pdfIn PDF document text
    • http://juha.be/_files/file/69522001096.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8a06cbb63---58824440059.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/4170269548.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/marazovixejap.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6649e7bf5---87512188257.pdfIn PDF document text
    • 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_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEF 10776 bytes
SHA-256: 691c066698f2f7cbc9a4775d03bff66388981adae011fec03d9555f2f3356f5e
font_02_sfnt_off000108e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E7 17408 bytes
SHA-256: 8a8322c8354642f6c1e80b83fae486032ca50c5c4c834240869a4f08e1bd391c

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