Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbd619c101a30a2…

MALICIOUS

PDF

69.4 KB Created: 2020-12-19 20:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6e8e12ee3b2d494b35322178556369b6 SHA-1: 291ec22539f09809e50972fea2c326b852d97154 SHA-256: 8bbd619c101a30a291fd9d194118031cea7e6fb05c633e262773bb93829c5e31
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs and the document's structure indicate an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=juegos+para+grupos+de+adultos PDF link annotation
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/duretazejoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_5f9ebe72b36d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_5fbc43704836d.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/babaputifajudef_mexupabixesu.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/tizuladurete_gegalexiwir_bomon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fd308f4eaa1b.pdfIn PDF document text
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/dagujakesukes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f913139e7061.pdfIn PDF document text
    • https://ranibifuvif.weebly.com/uploads/1/3/1/3/131381542/saxogokex.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/9706216.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/bojafazes/domisitotesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e15eb9-0d1c-4e34-a091-2133e563c72f/87900981203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f7efca-8912-4088-9ae8-bcf2136ffa83/fnaf_world_free_gameplay_no_download.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_off0000d3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B2 5116 bytes
SHA-256: ef3f2af56320851bc4e4df4a93766c7ad2ed9425ef4585e268a217038d45f193
font_01_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 11092 bytes
SHA-256: bdc371b61c8c2a61fb18126741eefcd8812918155899c45ddc0fbdbbb7d96e3f

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