Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab381a0e67b4525…

MALICIOUS

PDF

74.9 KB Created: 2021-03-28 11:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: da9974276822177fe06e79b5ac47263f SHA-1: 42d182f3012635618b5cc3cfe6d579baa05751a7 SHA-256: 6ab381a0e67b4525d128407bd7c327477ba6c6fb9f919ba6340276121dccbb7d
186 Risk Score

Malware Insights

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

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 0.9999

Heuristics 6

  • 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 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://botokaw.ru/award?keyword=chaos+theory+in+management+pdf PDF link annotation
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/2521224.pdfIn PDF document text
    • http://laithub.pro/jayasimha_memory_techniques1wuhu.pdfIn PDF document text
    • https://timowerudep.weebly.com/uploads/1/3/0/7/130738780/felulakonuzol-fetepe.pdfIn PDF document text
    • http://fapseo.ru/patirup717f1.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/gobidibamaxunuzoza.pdfIn PDF document text
    • https://sodapovi.weebly.com/uploads/1/3/4/4/134494820/bewosanebimoka.pdfIn PDF document text
    • https://bilugiwunifi.weebly.com/uploads/1/3/1/4/131408415/7955793.pdfIn PDF document text
    • http://raisinslabs.club/844146702064cr9l.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/6353129.pdfIn PDF document text
    • https://xegavepixax.weebly.com/uploads/1/3/1/4/131452872/4874610.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/mjgTSii/72260329318.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/hhjUohd/milibubopad.pdfIn PDF document text
    • https://kifakujokaw.weebly.com/uploads/1/3/4/7/134709271/8313253.pdfIn PDF document text
    • http://uscreditinquiry.info/excel_vba_make_hidden_sheet_visible7ojc9.pdfIn PDF document text
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/3700556.pdfIn PDF document text
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/3e49d255121f.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/sixenogafopoj/samsung_hw-hm45c_check_subwoofer.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/58832433721.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 5428 bytes
SHA-256: 0a1f166eed9f06b143743012ba40d46ba0a02b3758704e155e2e352b70591074
font_01_sfnt_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 10548 bytes
SHA-256: 5b11db42bf3b3b1a285d90b327a5428b7d665b06c444c81bad608c14ffd29bdc

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