Malicious PDF — malware analysis report

Static analysis result for SHA-256 842234fec376c802…

MALICIOUS

PDF

69.2 KB Created: 2020-11-23 14:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a0ad38fbbb03625176db577742092eb1 SHA-1: dc765ae8e3ffa0168b5561db823dd7bb48f86f91 SHA-256: 842234fec376c802ca530049ce746577748643988c93acd1dce3b9a30bafb5fc
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/123?utm_term=essentials+of+medical+physiology+sembulingam In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f9530298084f.pdfIn PDF document text
    • https://faxosuxen.weebly.com/uploads/1/3/4/3/134342902/sikiwuv.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/kepokivikubozoram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fa65a30b5c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_5fb38c668c40d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_5fae7072dcf7b.pdfIn PDF document text
    • https://bumopabir.weebly.com/uploads/1/3/4/6/134679094/1be3467.pdfIn PDF document text
    • https://lolewifewo.weebly.com/uploads/1/3/4/7/134710585/f89fd08575e.pdfIn PDF document text
    • https://sofowalomutupal.weebly.com/uploads/1/3/4/3/134310420/1382192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f2a903-344c-44ca-aaa2-ee95a887494f/xakezutale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f74c97-5655-4ad2-8244-2963273c5637/describing_motion_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5fdd59-e128-4c85-8889-3e52930d47fe/25122127417.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_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 5672 bytes
SHA-256: 34c7ed0ca3fb7e729e814f0644477cf5695cbf8bc3da5fa98d815d604c1fa917
font_01_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 11936 bytes
SHA-256: 9423c82c8390147de4ef59b05352be0518d5f76e504aec1ff8a20dd4ff2a8d60