Malicious PDF — malware analysis report

Static analysis result for SHA-256 969d739534cba3ef…

MALICIOUS

PDF

72.2 KB Created: 2021-02-26 20:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 794ef780c9f3b87a20b990b95559c7c5 SHA-1: 262e1c61b1eb7e28d5051801c574560903992494 SHA-256: 969d739534cba3ef28520167e02f8a35a5631b90e61f7a8f4d77c03f51113b8c
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8132

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://nipisod.ru/award?keyword=is+sears+repair+still+open PDF link annotation
    • http://wusodopepufex.66ghz.com/a_p_name_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_6037f38aaa273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_6002b912d0df3.pdfIn PDF document text
    • http://lavka-karamel.ru/vozagaxj9zq.pdfIn PDF document text
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/7687697.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/interrogative_adjectives_worksheets_for_grade_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5ffe254f8b5a3.pdfIn PDF document text
    • http://tujugataro.22web.org/resaresataj.pdfIn PDF document text
    • http://xobuxok.22web.org/eye_of_the_beholder_dd_download.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/cd4c5871.pdfIn PDF document text
    • http://tofabukusakuni.22web.org/organizational_chart_template_powerpoint_free.pdfIn PDF document text
    • https://vexitibivomak.weebly.com/uploads/1/3/0/9/130969710/204174.pdfIn PDF document text
    • https://dikarofojosej.weebly.com/uploads/1/3/3/9/133988548/faxaparoti.pdfIn PDF document text
    • http://jugixemetofun.22web.org/jemezixuguma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suxukapuvajobe.epizy.com/what_is_1-3-1_zone_defense.pdfIn PDF document text
    • http://zevideto.rf.gd/phet_forces_and_motion_worksheet_answers.pdfIn PDF document text
    • http://jedajokojar.epizy.com/istss_ptsd_treatment_guidelines.pdfIn PDF document text
    • http://lokemuwebofeg.rf.gd/the_aristocrats_2005_movie.pdfIn PDF document text
    • http://viruvivena.epizy.com/are_all_uppababy_vista_double.pdfIn PDF document text
    • http://rajimorix.rf.gd/dogobenomomanevebapix.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 4748 bytes
SHA-256: e1537494e0574a7cb9540e1090b8cd4a601201b8f090d66cc7bca07105bbf91e
font_01_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 10672 bytes
SHA-256: bf9cc6573eced804f340b97d1cafed19e5a8cd3d4c34cb8cf6685314da96711c

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