Malicious PDF — malware analysis report

Static analysis result for SHA-256 334a2ea1056aeda9…

MALICIOUS

PDF

74.8 KB Created: 2021-06-03 08:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e6ec4eb290a51b8ec7faff7a859465ee SHA-1: 516eed9b7975551540fe876a7731b63c9e28a131 SHA-256: 334a2ea1056aeda9a25b64bcef2cc0ac7f28c59aec69374980ade38673ceff75
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure related to printer issues, directing users to malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/pbw?utm_term=what+does+pick+motor+stalled+mean+on+my+hp+printer PDF link annotation
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/musal.pdfIn PDF document text
    • https://tevuratoza.weebly.com/uploads/1/3/4/0/134019225/42924.pdfIn PDF document text
    • https://zeruwowigewal.weebly.com/uploads/1/3/0/8/130813736/9e622.pdfIn PDF document text
    • https://kamowosig.weebly.com/uploads/1/3/1/0/131069991/pibivixepi.pdfIn PDF document text
    • https://kidenido.weebly.com/uploads/1/3/1/6/131636891/eb08a6b2c23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_60196435775e5.pdfIn PDF document text
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/vabat.pdfIn PDF document text
    • https://suzabotofofetab.weebly.com/uploads/1/3/4/7/134739937/5295271039c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_602bee910093b.pdfIn PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/wajarote.pdfIn PDF document text
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/kodomafefijukofir.pdfIn PDF document text
    • https://zopavuro.weebly.com/uploads/1/3/4/5/134584556/4c47b9a47828ada.pdfIn PDF document text
    • https://pepotojil.weebly.com/uploads/1/3/4/9/134900045/4090246.pdfIn PDF document text
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/d1c9796fdf3ba8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d42017-6ba8-40bc-8bf5-02a9ee1e344a/kajebovopefawidam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e845c65f-6350-475a-bcd4-e88793099802/50260474605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6554be85-24c6-431e-ad8b-c497ee35c2bd/95055011819.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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 5492 bytes
SHA-256: 17f6cda29c99fbea73f5a089ade0f939ce9d00d86dee7f2e42a6ca3f010ac31c
font_01_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 10508 bytes
SHA-256: b854874a6bd99f45872e67411d1382fe895b6e7499aae47a896587ebdc225c51

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