Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe610e8fde909ec7…

MALICIOUS

PDF

82.0 KB Created: 2020-11-24 04:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 19b3c584c9ad7a5716e1a2f655c9561d SHA-1: 81c370ac211e6e1643b9375b29f11485e1cb9a0f SHA-256: fe610e8fde909ec7ce2cf25501e8f4780873da43b410019667c837cc02e7cb79
162 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or spamming operation. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links and the ML classification indicate a high likelihood of malicious intent, likely related to phishing or redirecting users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/123?utm_term=1+samuel+28+nkjv In PDF document text
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/sonifowu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496811/normal_5fb5fd2e997f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8ae83e58d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f9ec018e93c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_5fb3e22d1dd6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5fada914d75c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fa46c5c25510.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/5808f415-43c9-460e-9eda-7f9be3c9282f/warriors_dont_cry_shmoop.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/babylonian_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfef18fd-ab0b-46e6-abd5-7b98eb56b6c3/zoganasupufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2781504-4b6a-4f37-b379-afdbdd7e709a/gozejagokot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c55714-93fa-4a5e-abf8-50d47c665e2e/54325363489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff77eb6b-1ff2-4a66-b792-579860f9ff84/51654385969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d121675-96b3-401f-b8c0-dca2db5544ef/18314418981.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_off000105b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 5216 bytes
SHA-256: c1ba392e2f4a32ae59182bb92bdd2c9ccc0ce2326c0cd74fd9f6450647cf200e
font_01_sfnt_off00011774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 10560 bytes
SHA-256: 40311a7048a3a9eb17c3077ed228edec156a4e5a015d05be02d038e7a875134e

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