Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d0e4fbf564e340…

MALICIOUS

PDF

77.1 KB Created: 2021-08-01 07:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75adc6e14bc0ac642a0eb89b0c893392 SHA-1: 74744eeeea79a10fc1029475a7ebaec72b4dfa4d SHA-256: 94d0e4fbf564e34095185aeba5d758cd34f47b82b0152226580d89f1c460c53b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://isystem.hu/ckfinder/userfiles/files/sobenusigadineb.pdf In PDF document text
    • http://engroupe.ca/aym_image/files/34609478126.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/94346170557.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/toropuzosesalupegofe.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/12122865104.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3f76b942c---86920314825.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17e9513207---41743843328.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/t2c9bptp75mrl259l4l6qt0iv6/figozi.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/o31l6u2f2jdrf2rc2d4bh6hl46/58361172498.pdfIn PDF document text
    • https://deepex.hu/hirek/files/47402078297.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/bonugimew.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/4ea897b708e1b861874209ad6ce4c435/kapokakafipafajad.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f743fa2eb76562796342f31493fb18e0/mogagofud.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/d3ca4f8db9c787b9e54fbac8ac66be05/10677668521.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/janovipugosolivobalafeka.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e99a34c2a---vogezejenizasabevudopa.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/90644038484.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/giwidevajagalijekurij.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/woxugotowajakir.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/93245890731.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/3g1nmfvg62pf32bg031ffhejer/3098124845.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/dajazipasapari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=financial+accounting+volume+3+by+valix+2012+edition+solution+manual+pdfPDF 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_off0000c4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F9 16588 bytes
SHA-256: 206bdfa8e6a8886b8396cf0ab50ff8d3da35527f4e6e061ab8eb7751334c788e
font_01_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 11828 bytes
SHA-256: 6357f06b93202b23fc7ab7cf01000bc51514a5cf8740059552de4acccb0b4d4a
font_02_sfnt_off00010c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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