Malicious PDF — malware analysis report

Static analysis result for SHA-256 6595114b91963b96…

MALICIOUS

PDF

84.6 KB Created: 2020-12-16 00:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 09c501e5dfc8d49ec22a2902ba8e4c3b SHA-1: 7865143571fa4f49961e37c1ee78ebc33ba1ae82 SHA-256: 6595114b91963b965ec048969287c042366d76e9f14da6b2fab0cae3b8fc5261
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffine.ru/123?utm_term=calculus+and+its+applications+goldstein+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5fd933e07551e.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/masala_difokesenigot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd1f23c0ebb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8a5e51549d8.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/0ef640.pdfIn PDF document text
    • https://xipejefokodidub.weebly.com/uploads/1/3/4/6/134612454/riwafetovirijux-wavisaw-jesav-jidepuriwo.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/3717507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f8bc37088395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471256/normal_5fc70f97e7df0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8b2f3ed4cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f8e3db702c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5fb8d85441df3.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/jivuxo/83637770098.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/76005208799.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/ditotekavu.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_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 5132 bytes
SHA-256: f1250749168e03e41cc5708f860355e2091da815576746897596943810f83471
font_01_sfnt_off00011d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D14 11960 bytes
SHA-256: c392bcc2610f18c661521391855440666216bf47b703afc119cebc1de91543f4

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