Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcd009981112652…

MALICIOUS

PDF

65.2 KB Created: 2020-12-24 08:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5ce3c8607d3b08d652754302354fd5d0 SHA-1: edced50d737aa16a0c02b6054ec4cc705dd75456 SHA-256: abcd0099811126526fe181c9c81a406a257dc90b007ee260d34641b316a7e420
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/strik?utm_term=supreme+duelist+stickman+download'. Additionally, ClamAV detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'. The presence of a visual download button further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?utm_term=supreme+duelist+stickman+download In PDF document text
    • https://cdn.sqhk.co/xebibugekux/8Ricthd/62824247339.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/SghdPK1/61950627069.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/ggjn1hg/zovowamuzevanojiteb.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/nezanurugega/xefuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b16ffad-e69a-4861-8b09-ed4bb2fb025d/theoretical_framework_examples_in_social_work.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/59716548467.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/70363271658.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/cramer_s_rule_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/visakifawowodaropugipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4885d6-8d55-46fa-b738-10f8ccbdc90c/zomubavowet.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/99220443772.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_off0000be40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE40 5480 bytes
SHA-256: 056f90e87fa6188ae1ad52df31487221ef1bc986b550fc19cb7910b858031786
font_01_sfnt_off0000d0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DD 11052 bytes
SHA-256: b52ebeb65c2b259ddb118c1298657257617dd91c6c2dddbe8349784e2777f43e

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