Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9e86def851856a…

MALICIOUS

PDF

66.6 KB Created: 2020-11-24 02:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d6ac415539f00d3d7afd6c02fb539ba0 SHA-1: 395d7ece4dbbb43ef24c633a39a2e9ab5d06232c SHA-256: 1a9e86def851856a1e9650b116c766453bbaebc5048003fc52564baa4624f71f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to downloading 'Batman Arkham Origins' to trick users into clicking malicious links. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation, with one prominent link pointing to 'traffset.ru'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffset.ru/strik?utm_term=batman+arkham+origins+xbox+360+downl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f89afefb7e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f88dbdea9410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5fb4f83031b32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5f9f3f36664c5.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/ribilumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_5fa5a1cea256c.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f9671ce8dbf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5faa20c77a051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8b79b037c7a.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/piwupevivotixi/nerebusu.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/quipper_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588d0d8e-3517-4971-a22b-bd475fbcec34/85685767666.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_off0000c608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC608 6112 bytes
SHA-256: bd0789ab37e065e9d678b72d200183c65eb6712b582bb3c3fcf7056460c4fb38
font_01_sfnt_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 10268 bytes
SHA-256: 5a82cfc168a3d10743584fbb8aa22002e50de42f8a1d765be49a50b29f561e8e

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