Malicious PDF — malware analysis report

Static analysis result for SHA-256 65312a1798849191…

MALICIOUS

PDF

76.4 KB Created: 2021-01-27 09:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3df1145caef6b36a93c4ead521f38d2c SHA-1: 6b09636d526feea41dc4756617153b0f323d5771 SHA-256: 65312a179884919162d0c7c23fe66ec2f93bd99830049e74a6f138c19ed76b65
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO spamming operation. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/wb?keyword=baby%20names%20with%20meanings In PDF document text
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/danagiwuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/hdSddij/jgap_hocking_hills.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/8d0479447d0a3.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/eihXjii/legexak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_5ff76e1db34a1.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/0hggha6/republique_dominicaine_covid-_19.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/jobifagimipupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5fdff85f7af09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fe52e57adea2.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/7f3376e22.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/fagaxelodometal.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/gYhgihL/farm_world_roblox_group.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/5750119.pdfIn PDF document text
    • https://geguxawuxereko.weebly.com/uploads/1/3/1/3/131379712/f9c42ec56eee9d9.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/7698020.pdfIn PDF document text
    • https://kopujigok.weebly.com/uploads/1/3/4/8/134862339/junamovipipexu.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/tuxalowafokuvo/ap_stylebook_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/tupilote.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/arma_3_takistan_life_mod.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_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 5356 bytes
SHA-256: 339c9fe890afa38ffb283e4b9f055f753df7abc6797d95b56ec0527ea5041e27
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 10572 bytes
SHA-256: e2cab54344e5f0ff16bbf5c2e23f632416c1c39d9cf26963244af55a4e344fec

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