Malicious PDF — malware analysis report

Static analysis result for SHA-256 229ec9ef9e4bcdaf…

MALICIOUS

PDF

65.9 KB Created: 2021-02-21 06:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5caf648b9c6483711ee17145f9a7eeb5 SHA-1: 3d48fe8188bab8473c940b1ad1e107b004162373 SHA-256: 229ec9ef9e4bcdaf103d2970ebd480af711b56ded76dfd75729066d24f4f876b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/strik?utm_term=kenmore+elite+gas+range+replacement+grates PDF link annotation
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/zajitararaxosuwon.pdfIn PDF document text
    • https://luruxelu.weebly.com/uploads/1/3/2/6/132682974/7828770.pdfIn PDF document text
    • https://riwivuzis.weebly.com/uploads/1/3/4/2/134265818/fiduseroziletunik.pdfIn PDF document text
    • https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/4425290.pdfIn PDF document text
    • https://lirigudufov.weebly.com/uploads/1/3/0/7/130776684/263d3aeb.pdfIn PDF document text
    • https://suretilan.weebly.com/uploads/1/3/0/7/130738944/xawiriwozatelilig.pdfIn PDF document text
    • http://gulidomirebo.22web.org/videzepub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/levumoduf/gopro_hero_7_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/balovujumekatewesakuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/fishing_report_washington_canyon.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/rhetorical_term_exaggeration.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CB 5012 bytes
SHA-256: 3aec6bf691fd213dca0dfdb280852bfb9be6eb68c85b2102411778dd06e2a94d
font_01_sfnt_off0000c5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B9 11148 bytes
SHA-256: d0bff570c479ef50901758ead9d9de1e2429f09c929d69daaaf0ac1cc71ca40d
font_02_sfnt_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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