Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2231e0266c8e24…

MALICIOUS

PDF

67.3 KB Created: 2020-12-21 18:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 342269b8c00cbe6073159a3431d4adab SHA-1: 9cd1648283648a4204d85ba7a6bb674299aaa6b7 SHA-256: db2231e0266c8e24a9366c022e0048fddb1683d3cb058b26783f1804f634d036
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=centipede+classic+arcade+mini+game PDF link annotation
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/dodep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_5fd888a5bcfbd.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/wipotegadodorek/single_stack_vs_double_stack_pistol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ab079f-3fcd-4cd2-991f-4ae29a69e928/zootopia_judy_hopps_porn.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294d0bda9c57a97c8e281/t/5fc4a8357acac6192a54b648/1606723637830/jitedexekusegimivuputim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d97797-a313-4965-b1bf-66ee088ea5b3/76433453600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df0050b-2339-45e3-acb8-7c0cdd4e02cc/it_s_showtime_events.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a5a49d-265f-46ce-a277-fe4a5b41c240/exercices_droites_parallles_et_perpendiculaires_6me.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/character_arc_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6757de5c7695ca9c1adce/t/5fd6e3b8b1c3f31c7a95207a/1607918521664/free_music_albums_for_pc.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_off0000ca42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA42 5300 bytes
SHA-256: eb2888f774b8e182b5d8a7c014486af6c2a2edea28316263c4b0e74244dae8f6
font_01_sfnt_off0000dc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 10768 bytes
SHA-256: 9df5b0b7337330656c53781bfb23e62393767b605407a2c8e305c2259c9fb9a1