Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb779d5cbb3c5f6b…

MALICIOUS

PDF

69.6 KB Created: 2020-11-17 18:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 59b7f86ea184d94fb055944b5fe870b6 SHA-1: defc688960c82865ab8204f6c6c7eb252f95ad14 SHA-256: eb779d5cbb3c5f6b0953cd356206e49079bd4ed359b584d5a879b1277bae0914
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=tv+couch+tuner+rocks PDF link annotation
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/2504727.pdfIn PDF document text
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/turusamut_lumixawafafogi_xogebepurojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5f92a3833048f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5fa3f2c52b805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fb369fb39f68.pdfIn PDF document text
    • https://mazemisa.weebly.com/uploads/1/3/4/6/134692176/furev.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/6151210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469645/normal_5fa4496ba7e60.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/9ae41b03-0002-46af-9a29-4186049b8ad0/encens_nag_champa_toxique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea152e0-968f-46d5-bc06-163ded053934/wrong_turn_2_full_movie_download_in.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_off0000d454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 4720 bytes
SHA-256: bf38b081c603bea533bd24a55188aed3d020b1458c465c5d396fcfc74255e786
font_01_sfnt_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 10892 bytes
SHA-256: b91785dba412d2b43d230b367012f23cd27bad7dcdc68b7c965e78e1ae8ca04b

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