Malicious PDF — malware analysis report

Static analysis result for SHA-256 11dad6e04200711d…

MALICIOUS

PDF

92.2 KB Created: 2021-01-28 20:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3d385ec1909e435d2b19bb9cc4078c8c SHA-1: 1bf8963a37beb38eac72ac7800c10dff515c7cf9 SHA-256: 11dad6e04200711df949cafb7cfc7763ab93264045537371a5881aaedb77c6ee
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified as a link farm, which is a common technique for phishing or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as https://jottigo.ru/123?utm_term=paris+%2528mythology%2529+brother and numerous weebly.com and s123-cdn-static.com domains, are likely part of this malicious infrastructure.

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://jottigo.ru/123?utm_term=paris+%2528mythology%2529+brother PDF link annotation
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/motilemepepid.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/9ea3c3946b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_600c01bbc593d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459170/normal_5fed498f5624d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5fef44d114eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_600b12449424c.pdfIn PDF document text
    • https://fexiganariv.weebly.com/uploads/1/3/0/7/130739648/9999356.pdfIn PDF document text
    • https://gipofomodofomew.weebly.com/uploads/1/3/2/3/132303323/ronowego.pdfIn PDF document text
    • https://binujoxejixisov.weebly.com/uploads/1/3/4/1/134108892/82553da15c0838.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dezoruxeg.epizy.com/wozulizonideguramujekaf.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/zalofaxoravomuzobigafave.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/62742851192.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/21210369820.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/90207854590.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_off00012a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 5496 bytes
SHA-256: c6d751aecf153150272c0639d795a24659df3d93e7741f5ea7d28d0215c59e1f
font_01_sfnt_off00013ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEB 11936 bytes
SHA-256: 4d8ce6d607d0672d71d2bff22664bfd59ef219ccc90382bd181559fe90f4032f

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