Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e125b69971bf22…

MALICIOUS

PDF

68.7 KB Created: 2020-12-17 01:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a9c1b4d32977643fc0c421e0655aed8c SHA-1: dee34eea75045b3aebc52f4191e866f9271e8220 SHA-256: 62e125b69971bf22b19909008e564d1884a4e919b655186b10d2b623907eb3df
214 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to external PDF documents, forming a link farm. One critical heuristic identified a link to a known malicious redirector, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily corrupted, contains text related to 'line play cheats for gems', suggesting a lure to attract clicks.

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
  • 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.
  • 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://traffine.ru/123?utm_term=line+play+cheats+for+gems In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5faff4fdedd7d.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_5fd0e1a9bc453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f873bcf6f484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380707/normal_5fc69f2cbcaf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fbb3ee254d44.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/zudaleribezulis_ribaxu_zudovozixezuviw_wegavuwuma.pdfIn PDF document text
    • https://nizufamira.weebly.com/uploads/1/3/4/3/134310662/6640900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_5fd5fe4348f61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc79084633934501854b92a/t/5fd6840d3ebe041631650c96/1607894029744/36574645357.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72731eddbb05c6893b1dd/t/5fc7912c48d5672cfb42fa06/1606914349721/.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf58ee9d79364840854ace/1606375663625/laterally_supported_beam.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_off0000cdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF4 5472 bytes
SHA-256: 79c9a1378df10200284b7bac21b4fabc602c06619feb04610562fa843f941364
font_01_sfnt_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 10676 bytes
SHA-256: 6e13bf6293a68c6492ac852a444d524fe8e96031f3979494add1d1252ccb3055

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