Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae97f279c9ef34d1…

MALICIOUS

PDF

74.7 KB Created: 2020-12-15 21:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b8e91b9070ed8a7f4516e68e10e2485d SHA-1: 03a958d7a064e4324e64756b84b2cd970e458d1d SHA-256: ae97f279c9ef34d1e50fa54e5c23fde635add0d86a93f7b6da54fbaaf07ee370
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is trafftec.ru, which is likely used for phishing or to host malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=charles+embry+hinkley PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5fb48d008c348.pdfIn PDF document text
    • https://bakavola.weebly.com/uploads/1/3/4/7/134753875/xawurivavetoradu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f97c8c7988af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_5fbdd1df9aa8e.pdfIn PDF document text
    • https://pajudeva.weebly.com/uploads/1/3/4/6/134657304/jokemexir-pujumesewejek-motew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_5f9ece7e35e3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1559bc6d9645836252c59/t/5fc822c3bbb7f45a927e92a5/1606951620369/25412158754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02465894-0728-428d-8ca7-6d905ae53bd2/vujitigoxuzefoxeto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf64bc9ee0f32b874bc143/1606378684392/double_edge_hacked_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce51147-762d-4d0a-9be2-856c023ab484/tv_guide_ogden_utah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154369ec-db03-4297-85bf-f952241829e1/fejekoxarezepozasagimetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6050fd1-9a87-43d2-b495-fe8bce72333e/gegagalosiwovodeji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6588f27a199023ada6d7f/t/5fd6c4f1ffab5d3c560970a2/1607910642970/90364433632.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/game_show_gauntlet_answers_reddit.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_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 5136 bytes
SHA-256: f4d227a5111acd082f992c17d829036b8c6313c2bcef1fa6b8cbc19ba1bf77e1
font_01_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 11560 bytes
SHA-256: 46c89ddf2482d3f09fe5ad2f63f5a3334a7cf9f4be1e17374020c5b96ca9b16f

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