Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61d57a5423fc927…

MALICIOUS

PDF

71.2 KB Created: 2021-03-05 05:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b5e878682888aecb09359955daded5c8 SHA-1: 54d8fee9d993d6d50a4833d78a869d88dd963feb SHA-256: c61d57a5423fc927eb36aa6d559ebe4a85c82cf827c103d53b2289a0b4a63186
202 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, appears to contain search terms related to car parts, which is likely a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://mezovuduw.ru/strik?utm_term=1994+honda+accord+parts+for+sale PDF link annotation
    • https://cdn.sqhk.co/wojusipi/5iguzia/elementum_adventure_vehicles_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/dhfthdQ/murder_mystery_cast_names.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384468/normal_5fe107665b154.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/2498c5b22.pdfIn PDF document text
    • https://sanexopapodepal.weebly.com/uploads/1/3/0/7/130739353/nulisug.pdfIn PDF document text
    • https://zematewisa.weebly.com/uploads/1/3/4/8/134897668/timomo.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/hgidiiI/59552095668.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/7929067.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/rosudajiboxatokuwiritex.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/totagaxanupifa.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/cwghijz/zinegaxubunalonis.pdfIn PDF document text
    • https://fafemuwupid.weebly.com/uploads/1/3/4/3/134368635/8617999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446937/normal_5fdc1699b1873.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/idifhfO/stream_video_downloader_firefox_addon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/sutekojafoge.pdfIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_a7f17c5af5d54ec8a8efd009b366b558.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_66a2c1490538472091f742adef4b05fc.pdf?index=trueIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_6e0bdc3b087843fda721ac37c6271390.pdf?index=trueIn 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_off0000d9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DA 5444 bytes
SHA-256: 7b1f3ee1a7ec31b448f638f0428da1cbc6868e859cd5c55488e6cedf9f548604
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 10432 bytes
SHA-256: 1b494cacff470c4614441cb0b4f1df7e073f7aca1ec5ba76524a6bb0e8659d4c

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