Malicious PDF — malware analysis report

Static analysis result for SHA-256 c177d9770365f7ee…

MALICIOUS

PDF

77.8 KB Created: 2021-01-21 13:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ec81852960110fa83902c8f1cdf4d190 SHA-1: b626aebe536768f8f58dd61d4088281157243d72 SHA-256: c177d9770365f7ee5537aa262e5660a6a376328ea9245a513e4bf71481e28fb7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine rankings or drive traffic to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or traffic-driving campaign.

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://trafficel.ru/wb?keyword=penguin%20pete%20cbd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502236/normal_5fd9955772eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fd36be88fa6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504922/normal_5ffe448adf092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f92741dcce05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5fecf5a7471e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5fd1bae5911bb.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/zeruzumobeveguxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5fb7f4fba9a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fe9f082092ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f954ee6bfdf7.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/podagazutaxem_dogexekupud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5fe21e7c26617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f8f84f7c523d.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/bivanud/fefurasu.pdfIn PDF document text
    • http://wuvasof.epizy.com/avengers_assemble_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/gegaxarixutir.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/biogeochemical_processes.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/46430666802.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_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 4864 bytes
SHA-256: ea00d485b126b4ed8ba07f48189e09273c9b335696408a33535d038e8aaa5062
font_01_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 10756 bytes
SHA-256: d77f3f7aa649414851128851ac6974e2b9dd7f5021ed3c320ec5212989ca837b

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