Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d9fc28731012ce…

MALICIOUS

PDF

101.1 KB Created: 2021-01-16 20:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 95247a9d0b07bfb3e64e4a3ea4f134a7 SHA-1: 875331342ee88eaddf5d22dd1b30f3c55e365666 SHA-256: 86d9fc28731012ce6288454cb700a711edf7e07f90a9a40f0a43b689ba8b816b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'club induction ceremony script'.

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://trafffe.ru/123?utm_term=jr+beta+club+induction+ceremony+script PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8df8c7309f5.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/bf27afacbb.pdfIn PDF document text
    • https://xafineker.weebly.com/uploads/1/3/4/7/134701786/33f8453ca49.pdfIn PDF document text
    • https://site-1166620.mozfiles.com/files/1166620/strategy_and_tactics_business_a_level.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_5fb7033ed280a.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/difegazixar_dexugavojodewod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5fde10e30a0eb.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/xiveratedewur-jiridogere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464067/normal_5fceab49950c5.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/lanorolowu/algorithme_apriori.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/pujimofofetidimipe.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/24644733663.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/98006415697.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/gituduboxefexesaros.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/70152126314.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_off00014ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE6 5452 bytes
SHA-256: 02a2248e1d1c35238aeb2004ad1011b3877f0974d71e259676a8b82447f009ec
font_01_sfnt_off00016158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16158 11092 bytes
SHA-256: 04aed69f2c188bb5a65b7b8967a686e8d929f6d913f155fd6b6b4691cde86aaf

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