Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39fb0afd0768cb3…

MALICIOUS

PDF

103.4 KB Created: 2021-03-28 01:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bb61a6d01f382ab69d64ec6a2da6a9bc SHA-1: 57089310834ae38c06a53eba1981b1533e398d11 SHA-256: c39fb0afd0768cb321ca980b7fc30d3c6722d83f96d0623689718f3bc356f353
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 0.9995

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://fokemale.ru/award?keyword=las+aventuras+de+allan+quatermain+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457006/normal_605d71f0c8964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fc850bc18012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5ffa08704d643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fe97dd62c686.pdfIn PDF document text
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/nabavozosemuzor-lijevotarimele.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/1308131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_6005abb197d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_5ffd2c19bc5da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fefa1e283fc4.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/temilafofanej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_604cc3212293f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444110/normal_5fc8464f31c53.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/bJjbChh/monster_park_ar_dino_world.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_60021f4cb6c88.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/bgijd0W/66419009441.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/imgfGjg/maxpreps_ohio_soccer.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/gezgghh/rixemosikovapozam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_6032fa3c69505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fc9054b34da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_602e2bb589fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_6016ebab493e5.pdfIn PDF document text
    • https://lagomumudalo.weebly.com/uploads/1/3/2/6/132681699/nikagaduwaka-kalakumobuf-menitewani.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/kudefem/98765032556.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/sofinukunir.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_off000153ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153AE 5316 bytes
SHA-256: dbfa79bffe5ed88195fbaa2a1eae0ed53515cbe08094e3bcc992eec1ace835a8
font_01_sfnt_off000165b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B7 14408 bytes
SHA-256: bba14823ae53e4c597ca5ff241f6cd525799759eb7c57d75806ea2d79780d415

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