Malicious PDF — malware analysis report

Static analysis result for SHA-256 15442144c351b270…

MALICIOUS

PDF

66.4 KB Created: 2020-12-17 19:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 31eb530d8765d26d38f61b2cf0f1abc4 SHA-1: ed722e8c1276a666cb68e9d0dd3276fce84ddb62 SHA-256: 15442144c351b270101bcd8411d58f95a361e71fa97f0ee267f7018e570bcfc3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a game modification download, suggesting a phishing or malware distribution lure. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

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://trafftec.ru/123?utm_term=dino+hunter+deadly+shores+mod+apk+rexdl PDF link annotation
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/revivogubilug.pdfIn PDF document text
    • https://zuxafeduf.weebly.com/uploads/1/3/4/6/134626046/sugitesidurulow.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/buponuwebi/sovogujamikexaxozegur.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/apps_to_get_followers_for_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/blank_calendar_may_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/foxufefekunajixifilok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968ad8cd-f2ee-4f06-91ed-ba85f9c6e40f/19577639140.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/broken_glass_song_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aba4917-5ff9-4b38-b749-ac744affd4ef/pepekasovidazanuzax.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/yugioh_tour_guide_from_the_underworld_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4d72b461ae47fe9e1781/1606241651344/15859674830.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_off0000bfac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAC 5432 bytes
SHA-256: cf8dfab8813b7fa767455ebd059084babd3ee109f4bf91e17b28fad50451aaf4
font_01_sfnt_off0000d209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD209 13448 bytes
SHA-256: 2499c046065576a613908f4e7d2aff3f7f34a5e8527d73b3f9f39ba5fd69938f

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