Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91447b1568504af…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 12:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ad8732635e1b1df7fe14160ad154f944 SHA-1: da64731558030d2be4a2268dc9a25ed51d2721a6 SHA-256: e91447b1568504afa0046fc899898aee791e895153100557da1d0134ec20d3b7
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous external links disguised as search results for 'Frigidaire repair parts near me'. The primary purpose appears to be redirecting users to potentially malicious websites hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://seumenha.ru/strik?utm_term=frigidaire+repair+parts+near+me PDF link annotation
    • http://bestplacefor.rest/lotoxoditufadulutajulewefhu91j.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/gehjjhd/apple_messages_app_for_windows_10.pdfIn PDF document text
    • https://zevikevugibemu.weebly.com/uploads/1/3/2/7/132741211/725633.pdfIn PDF document text
    • https://lewugudufe.weebly.com/uploads/1/3/4/6/134668986/8bcec8414cf94f.pdfIn PDF document text
    • https://tebozelekunoton.weebly.com/uploads/1/3/1/4/131453588/0c720a.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/ySL8jbV/grandpa_movie_with_robert_de_niro_2020.pdfIn PDF document text
    • http://fishing-rods2.club/meteor_garden_2018_ost_songnolw6.pdfIn PDF document text
    • https://bumeguzi.weebly.com/uploads/1/3/5/3/135391430/94d8e04dd.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/e74513.pdfIn PDF document text
    • https://lakiromepokina.weebly.com/uploads/1/3/4/5/134589127/tawexikid.pdfIn PDF document text
    • https://mudabomem.weebly.com/uploads/1/3/0/9/130969182/5128261.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/jurassic_world_evolution_dinosaur_statse1jcx.pdfIn PDF document text
    • https://zugowexilib.weebly.com/uploads/1/3/5/3/135349829/9721979.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/gogunabones/82221708114.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/metal_texture_blender.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/tovobamusedax.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 5200 bytes
SHA-256: 4e78cdc048a79c1a8baafa3caf4506ee7cc3a4044abf9dc3822e1ebc38156b02
font_01_sfnt_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 10480 bytes
SHA-256: a03861ee5c7a09aa9b5555a0f29047ae675c0a55ed3d57b83050e7e8bf382b51

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