Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ee02fee4d92d4d…

MALICIOUS

PDF

72.0 KB Created: 2021-02-18 17:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ffbfa0d4f569ccedff401a5c1f29fddc SHA-1: 926897b632a9fcbb817a07e98ed0168c45494f14 SHA-256: 36ee02fee4d92d4d169cfeb3336dd623438668b9039208efeb6e3ee962cf25c0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://jacksth.ru/strik?utm_term=gorilla+mentality+quotes PDF link annotation
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/266a01ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ff86f1b72337.pdfIn PDF document text
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/3755791.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/firofokelilufixoku.pdfIn PDF document text
    • http://sozefavi.22web.org/kerarezadisiwumakebedak.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/8640873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dujepav/26570533942.pdfIn PDF document text
    • http://napizexem.rf.gd/2155076100.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/jodha_akbar_serial_video_songs_mp4.pdfIn PDF document text
    • http://sudiwoke.epizy.com/83948240709.pdfIn PDF document text
    • http://ledugezutixajo.epizy.com/kodawi.pdfIn PDF document text
    • http://lujubozugib.epizy.com/2920005042.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/ganesha_atharvashirsha_tamil.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/56604556661.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC8 5088 bytes
SHA-256: fb3eb16c960d7d425144fa522ae49d134a7243a747d473278de092f47386c64a
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 10792 bytes
SHA-256: 0b2550e75d52d3a3a4166ea31f6c8fc6f52e62e8145dde8bd0eeb701fcbab45a

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