Malicious PDF — malware analysis report

Static analysis result for SHA-256 c166ffffe391e5b7…

MALICIOUS

PDF

56.8 KB Created: 2021-03-09 12:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0b3f0b9fc63eae5cae48aa2279ac8518 SHA-1: d0e3b7f8f927cfd659134b5205aa330e174cb60b SHA-256: c166ffffe391e5b77875dc508cda50126c3c859e62e30e48bc245f8eb83023ad
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, appears to be a lure related to a video game guide, intended to drive traffic to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8321

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.
  • 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
  • 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://nipisod.ru/award?keyword=zelda+ocarina+of+time+3ds+guide+pdf PDF link annotation
    • http://zoneeuro.pro/sutorofibalupp8a1.pdfIn PDF document text
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/2694867.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_6007d4445943d.pdfIn PDF document text
    • http://zuvels.xyz/71457432387akwcd.pdfIn PDF document text
    • http://megahit.space/online_registration_form_of_uosdlv5i.pdfIn PDF document text
    • https://lotojenamiz.weebly.com/uploads/1/3/1/3/131381761/bufuzonaxewidulirad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fe92c0cb514b.pdfIn PDF document text
    • http://fruitnaturs.space/cambridge_igcse_ict_second_edition_free_downloadw74x2.pdfIn PDF document text
    • https://bemagage.weebly.com/uploads/1/3/4/5/134525224/d7dcbd37d943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6032c63c18e74.pdfIn PDF document text
    • https://sakojokotinij.weebly.com/uploads/1/3/1/3/131379540/tudejawedavovof_kujodu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485826/normal_5ffec2ca1cc16.pdfIn PDF document text
    • http://kvrovk.xyz/dragon_age_awakening_gift_guidexj8hs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_600a9de03c725.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/1978530.pdfIn PDF document text
    • https://sejevijuwev.weebly.com/uploads/1/3/2/7/132712154/nivimebiludat.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/4f6771d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_5fca45de952e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_603f11649d642.pdfIn PDF document text
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/fuwifetopezosutifita.pdfIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_bd065c98d42a477eb92e10d99f992967.pdf?index=trueIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_b7cec1b604794b10a1d67070c5e2ec9e.pdf?index=trueIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_0fbb8a273dca4276ae04fdd71689a2cd.pdf?index=trueIn PDF document text

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