Malicious PDF — malware analysis report

Static analysis result for SHA-256 30096d1d5688da75…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 11:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eddec32be3e575793466fdf3808655b7 SHA-1: e860ac5335457ca4ee879fcf3e21d5919548ece4 SHA-256: 30096d1d5688da75733bd578dca22823757dcdfc381069b1661d88e83dbece9d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted PDFs, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute malware or phishing content through these links. The document body is heavily obfuscated and contains metadata related to its creation, but no clear user-facing text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=new+garmin+945+release+date PDF link annotation
    • https://jikovezogid.weebly.com/uploads/1/3/1/4/131407088/joxujo.pdfIn PDF document text
    • https://riwivado.weebly.com/uploads/1/3/0/7/130739124/a926201.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/cngjer7/65920437870.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/4219331.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/hiuKRrk/96996712926.pdfIn PDF document text
    • https://cdn.sqhk.co/simizekovogi/eaievhi/bugsy_drake_sister.pdfIn PDF document text
    • http://world-wild-shop.com/wetazitarisuqlcfm.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/gazeburavugafinof.pdfIn PDF document text
    • http://3gusevshop.space/financial_budgetsfwm3h.pdfIn PDF document text
    • http://phrensy.co/cursive_handwriting_practice_sheeto8hff.pdfIn PDF document text
    • http://pisodanijuke.iblogger.org/57986260283.pdfIn PDF document text
    • http://milanomoda-italy.website/free_rock_ringtones_for_mobileot2l8.pdfIn PDF document text
    • http://masalev.ru/cvs_flu_shot_consent_form_20191qbz2.pdfIn PDF document text
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/31c8a3be44d9056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 5572 bytes
SHA-256: 709ee417807f7daca9dd6c24f30c7af3b782126e81614e86b79c18ef3aa20078
font_01_sfnt_off0000ecaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAF 11072 bytes
SHA-256: db1f4404a6dbb902f246588bfffb845ec4c9170ffd98c9d88ae558241e0f81f3

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