Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2469ee7cff22e1…

MALICIOUS

PDF

70.6 KB Created: 2021-09-20 20:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d32ac7c9b5762b03f78e93f54eec08f SHA-1: 766585f33d069ae6a5b5169ab740d6c13091ca2c SHA-256: bc2469ee7cff22e1161d6b23e7efd11c485a77c850ea84704ddf07bd87515611
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically flagged it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bisenzia.it/userfiles/files/velajeposurajeruxotup.pdf In PDF document text
    • http://yogasol.cz/ckfinder/userfiles/files/58760099731.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/lofovijerufasodivolezilo.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/vekuwum.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/janawanupixosumigivewo.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/dakasitojij.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/14592052771.pdfIn PDF document text
    • https://novsport.com/content/File/xabojegirejineru.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/nawililaniwutozakorojeriv.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/favidipolizodij.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/senituviwozegim.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/65957788470.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/pofize.pdfIn PDF document text
    • https://kultmotor.hu/images/files/9821276764.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/bakitaw.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/tuniwobobuzu.pdfIn PDF document text
    • https://nistd.in/userfiles/file/pegolo.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/18159838817.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/bejuresopokusetipixe.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/cb19b58e8a1e773ef5459ea7b1e67b7d/riviragewu.pdfIn PDF document text
    • http://bjjiffy.com/upload/zewukem.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/mujebud.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/e871b736ea6c393fe3efe8f06e86d08d/61170415540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=volleyball+game+download+for+androidPDF 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_off0000b556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB556 10740 bytes
SHA-256: 9e1c0753ec321e0b08d7d7f077d354e9bf661689b159b96289ff759759033d93
font_01_sfnt_off0000cdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCE 15324 bytes
SHA-256: abe6b5ac07bbf472089b774e1c4cd599d218b73e4b049c7d574f77b542fe9383
font_02_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1