Malicious PDF — malware analysis report

Static analysis result for SHA-256 645555ace4847e19…

MALICIOUS

PDF

104.8 KB Created: 2021-02-15 07:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0051f5ed4d9ab1a1bcd67327f0011a1c SHA-1: 372eb233c90a703b9c10d0752f9f29575c8be655 SHA-256: 645555ace4847e19e91f1d85400485a9fedc2bc7b930efb81911e49adfed6d57
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier also strongly indicate maliciousness. The embedded URLs likely lead to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://maypoin.ru/wb?keyword=draper%20esprit%20annual%20report PDF link annotation
    • https://cdn.sqhk.co/pakebisas/3ynoqhd/razeperipixopulaloj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481272/normal_5ff764b4ee111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fc740bbaef23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388611/normal_5ff57f5bcb943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_6029ee822a698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368788/normal_5fe3ab60436ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5fe2bc75876bf.pdfIn PDF document text
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/1292844.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/a9UJjgE/river_shooter_air_combat_war_planes_strike_force.pdfIn PDF document text
    • http://sallles.ru/7_days_to_die_garage_doorzjqcb.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/gjRsNPS/liviraxotolun.pdfIn PDF document text
    • http://khareedforosh.com/rejuxik2vqe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452395/normal_601c5c104dba7.pdfIn PDF document text
    • http://itfamily.info/t._harv_ekerve69h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fc60ceb12743.pdfIn PDF document text
    • http://pl50off.info/pekiwibutataropi4jbq7.pdfIn PDF document text
    • http://wabuxon.iblogger.org/vesoxow.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/9JUqhhJ/12520890533.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_off00015ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE4 4812 bytes
SHA-256: 68bacee3185320018769275326c165cb99ba2e07328ec540d1a1e1a678a01a36
font_01_sfnt_off00016f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F50 11896 bytes
SHA-256: e398c8c719f2a297c9a326513fae115758855e3a32c069ebd6d6793e80573444

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