Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f62c1dad4321dd4…

MALICIOUS

PDF

85.9 KB Created: 2021-08-23 22:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f64365dfe55c2fccbbbf69cfa1f474b8 SHA-1: 57f51a5d7ee1e76b61d14534c70daf48ef239582 SHA-256: 3f62c1dad4321dd40a76da20b6430ef91d177e839f193646f59780e6857eb088
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the document is intended to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=everybody+do+the+flop+meme PDF link annotation
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/palas.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/vijavefu.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/kakexemigorobivorisinalo.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/80f55827e028f5305b4c9a7d6341c669/zutizereteduvewuji.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/mirubirodupek.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/luxalipedamedirajix.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/71534851530.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/55942285852.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/xudawadu.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb37f9fa3d---49114421712.pdfIn PDF document text
    • http://beiks.info/public/file/34491875912.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608609dabab80---23488281161.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/84891643608.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/48818970717.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/mekosenamepe.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/61ee732a4306328787a256cc047d2fd7/xefivesor.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/botajudedobelus.pdfIn PDF document text
    • https://nexusmediation.nl/files/40414932161.pdfIn PDF document text
    • http://flexa.cz/docs/file/kizeseto.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/3670611346.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/xosibafalujeper.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ff448798ce0---77817400421.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210623083213_cmeaxv.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/70959917479.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/fizabe.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a9f6c1ccabc84b7b870341ae835b2720/62090915171.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_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 18748 bytes
SHA-256: 05475428c1d7577843d6e35aefc5d0f616aa636f71cd767b99b1a2c1051fb5a0
font_01_sfnt_off00011a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001322e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322E 10540 bytes
SHA-256: 3ae1cd77f033049130971c7fbe01671911c75969261e5432f388d6540b993fab

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