Malicious PDF — malware analysis report

Static analysis result for SHA-256 9461665e594fc564…

MALICIOUS

PDF

92.8 KB Created: 2021-06-03 18:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 587de89c6c7c31f1e3ac822622824883 SHA-1: 5d3bf410c1b07569cb75aaa9729b2013ac0bdc74 SHA-256: 9461665e594fc564a958b9740ce7110c9294658cc1d4c24f9a57646d7f995d24
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting it is part of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/pbw?utm_term=bebop+2+freeflight+pro+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464521/normal_602b0e663a2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fd65273d8ae5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fceb5ea76a13.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/b872efba6c2291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_601b27f7282fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_603fd87d49087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421939/normal_5fc80d434a89f.pdfIn PDF document text
    • https://vitiwujujoter.weebly.com/uploads/1/3/4/6/134659282/xapenoriwewem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479921/normal_606bcac7255b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_600c727ebc6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464709/normal_605dc9a0476d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5ff22fdb1ce4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_602ffb4d27711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosirata.pbworks.com/f/xeferobotupopilokux.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144458250/44875264310.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144417930/44194045574.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/83297691246.pdfIn PDF document text
    • http://favixose.pbworks.com/w/file/fetch/144539772/2009_jeep_grand_cherokee_repair_manual.pdfIn PDF document text
    • http://zufumegi.pbworks.com/f/funapupozikunofodidaviwiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 26272 bytes
SHA-256: ea8d813e16189c44bbd49732e47a8a16fa524c38c038133e26fe34a7480cdd1f
font_01_sfnt_off00012bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC1 5460 bytes
SHA-256: 99e74907bae57e4fb8de896aa2749caa5a13268a0b0595c8ec905481d3245cf0
font_02_sfnt_off00013e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2C 12288 bytes
SHA-256: 4c014d7dbb5f710c4d6fa6e4df170071d5975f140b7ed37577331b6b6e49924a

Open this report in the interactive analyzer, or submit your own file for analysis.