Malicious PDF — malware analysis report

Static analysis result for SHA-256 002a389bb3c87d50…

MALICIOUS

PDF

78.4 KB Created: 2021-09-02 08:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01882779a9f88f8c2fa77dfbd49bf569 SHA-1: 32d8147900129d3c8a550156383935437285cb55 SHA-256: 002a389bb3c87d50fa3eaaa312fd2b660ab3f75e998114f9ddf2173e53f8dc0c
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 links pointing to compromised WordPress upload directories and other disposable hosting sites, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://drafthe.ru/uplcv?utm_term=writing+task+1+map+questions PDF link annotation
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/lasolape.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e3f472cdce3c307991b4fff78eef3df6/sexafeloxafijeb.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/81964905225.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/73492514361.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/jitirarobakino.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0bfc763796fffd50b5c08a588d5fbaf0/34718313654.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be0b308259---719578801.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/eqsrcijt90612918qtoqmkiq16/57263728144.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/40506377804.pdfIn PDF document text
    • https://e-room.co/userfiles/file/85093104900.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/7792760715.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/31103574083.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/23668676264.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/j2n02vrffl44n46ek6e4c8nre6/pawexi.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/30537023095.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/157a31a69e4ee48c864190350a2bd7ef/13246340771.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/tejole.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee2d823cc7---36460445454.pdfIn PDF document text
    • http://cmtsport.com/pliki/57677184455.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b998d47bbea---70506434007.pdfIn PDF document text
    • http://tcihk.com/userfiles/78277780355.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612549ada5ae8---42784724779.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_off0000cb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB92 17800 bytes
SHA-256: f8055962e2d21de963142f34294df48e0eeadf75f6c50da2a398042250fc4f3a
font_01_sfnt_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001125c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125C 10932 bytes
SHA-256: 0714d6660901094ed8d8ccffb878f5f6d685abcd563a21e9f8975394472d9ed4

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