Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0392b6298adb289…

MALICIOUS

PDF

78.3 KB Created: 2021-06-08 22:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e756f05772efe204f7d55d3b06489079 SHA-1: a8f9631cdc633a30ce4642e16052a3ae56294873 SHA-256: f0392b6298adb289cabe060cc907cb86165a170646d5e66393db3a126be1b1c9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The primary URL, 'https://irlanc.ru/pbw?utm_term=discord+tts+funny+beatbox', is likely part of this malicious infrastructure, aiming to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://irlanc.ru/pbw?utm_term=discord+tts+funny+beatbox PDF link annotation
    • https://zuxigazazopak.weebly.com/uploads/1/3/4/6/134688762/ninaxena-maxigak-jerawomaf.pdfIn PDF document text
    • https://veledagovivavav.weebly.com/uploads/1/3/2/6/132681602/4703527.pdfIn PDF document text
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/97439f.pdfIn PDF document text
    • https://bokorakalawu.weebly.com/uploads/1/3/4/6/134643693/rupuw.pdfIn PDF document text
    • https://nasubodido.weebly.com/uploads/1/3/4/3/134313400/robujajix-kuzonaja-nupamoxekotew-fomij.pdfIn PDF document text
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/minugekodep-mugilotimeda.pdfIn PDF document text
    • https://panelaxefejavej.weebly.com/uploads/1/3/5/3/135306159/1245559.pdfIn PDF document text
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/solatide-merujivesopuka-lenibupiza.pdfIn PDF document text
    • https://kowedanu.weebly.com/uploads/1/3/4/6/134687265/d6222ec.pdfIn PDF document text
    • https://fababeporutow.weebly.com/uploads/1/3/1/3/131381804/1196202.pdfIn PDF document text
    • https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/d10fac8f0.pdfIn PDF document text
    • https://deketonozalupu.weebly.com/uploads/1/3/3/9/133997688/8085885.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144727986/lomefa.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/w/file/fetch/144672090/97006228427.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144558111/gebezotetexisedija.pdfIn PDF document text
    • http://wisarazed.pbworks.com/f/doluzefonogarux.pdfIn PDF document text
    • http://sejiliki.pbworks.com/w/file/fetch/144547608/lilajabojunagoz.pdfIn PDF document text
    • http://vulazojab.pbworks.com/f/gugew.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_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 5292 bytes
SHA-256: 7fb13cfb5b2a5deba1d388f67e38a10939ba097dc3b98e835623373961e560ab
font_01_sfnt_off0001050f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 11280 bytes
SHA-256: 4dc05afa859157f311e00f00ea83c074f243d79362efd8b3759504df1f806632

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