Malicious PDF — malware analysis report

Static analysis result for SHA-256 62336f3cdc298b6a…

MALICIOUS

PDF

64.5 KB Created: 2021-02-18 21:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1fa990121506dac5adbab280d7f7cdb2 SHA-1: 319857dbb123c9757f387fa93f657a3d55313100 SHA-256: 62336f3cdc298b6a1e264809f7eb2b18e37bc7abaca10fe0aa03b8da3891fad0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded links pointing to external websites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple disposable domains and link farms further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wb?keyword=dixie%20chopper%20parts%20near%20me PDF link annotation
    • https://duwelivupegated.weebly.com/uploads/1/3/4/7/134711348/nifevofe.pdfIn PDF document text
    • https://jalaxogazumin.weebly.com/uploads/1/3/4/3/134373329/8afcd79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fdbfa448dd3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fd86a2f73b81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496584/normal_5feff004a85de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_602b4041d55f8.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/j5LTjjF/nikini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fef0bb4bf98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_5fe9759e19c70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367005/normal_5fc7dfd163f4b.pdfIn PDF document text
    • https://sitixibabu.weebly.com/uploads/1/3/4/7/134749551/5973560.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/hgijehb/3194351696.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/OMyMjhi/papixujoperosonimaxig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivoxubi.epizy.com/3345264662.pdfIn PDF document text
    • http://wokobudedisete.rf.gd/c_template_method_return_type.pdfIn PDF document text
    • http://kizarepopudoso.epizy.com/womovipoduxexozom.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_off0000c176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC176 5208 bytes
SHA-256: 212e952a5a5ad2bcc27a0c9fbef411d9cdc097c9e40f969986e8d3ba1df4625e
font_01_sfnt_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 10052 bytes
SHA-256: 5df4dd251ed3379382d8c69ebb7e3b246ee89f2a8df6db1854ac4635438a0024

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