Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e79f94b15aecc6f…

MALICIOUS

PDF

99.5 KB Created: 2021-07-13 07:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bd57071b984b1c10ddfdbe11dd27a0f9 SHA-1: 1507ef1beb944020020c7fa76fd3636445d50daa SHA-256: 7e79f94b15aecc6fc2054886bdf641ac1432ae89acd8cf3143a0a32a6f26300a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech support scams. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=i+need+you+to+hurry+up+now PDF link annotation
    • http://moon-villa123.com/CKEdit/upload/files/97075004953.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/90038740422.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608be38c3887f---padapawu.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/posodadivoku.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60E10E0D66095.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f75163eed---rogexubigexajosoxo.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/27153291973.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160701ab30d1f7---14434114516.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/98013128631.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/16617915722.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/masilitazut.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609650ed9739d---jesapadakukojiborumexor.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d7d21568c---45507142303.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095fdc8329fd---lawafuvir.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/66364941454.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608796bcbe656---15647072595.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/178eeaa629ffc248aa59bd1eaa086e8c/radonar.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086952ae26fb---69359046211.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/rarimikon.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cb1283842---99247625951.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce9ccf044f---14801895215.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081d5272ba0c---janurid.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e363e8e7e---23568832386.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb991e336df4a5ab3056f04efbe264a6/nagogepanesepowurojav.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/pmihv4tuibmj3hlrq1ufp8s4p9/vubonamusapunud.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_off00012186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12186 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001399d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399D 10272 bytes
SHA-256: 0462003a79ecbcb85b5042584529cfea13f0aec9341d91029e46fe3693d19604
font_02_sfnt_off000150ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AD 17696 bytes
SHA-256: 7a6c6b07634628e086af254b6329d21267b3d303dea9eff9552f6fc22da7ae75

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