Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f381464353c9581…

MALICIOUS

PDF

68.7 KB Created: 2020-11-20 02:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e0b14d11f7d3be971edc609113b2f2c SHA-1: d8ed88bd3c300eae8db04b761d0b535a49f745ca SHA-256: 7f381464353c958142229ed748e08f9b3c4c2ed00cb2d40525bdb5def2fc4ef6
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 0.9998

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://traffking.ru/123?utm_term=medical+school+application+personal+statement+prompt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8d3fd271650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5fa8e02652e15.pdfIn PDF document text
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/zewujidisamozixure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5f98d11d8d07d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_5f9fa8764d567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f870f268a02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5fa80cc6797b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_5fabb14234215.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/revifada.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/bujepipilokuziron.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/55250828112.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/business_process_modeling_simulation_and_design_second_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/030866e9-2656-4c3c-8867-3031dd62dde3/19644351698.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/vabevaxibavigej.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_off0000d0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FC 5316 bytes
SHA-256: f19526eb21f470c4240e29d3226d19d815e7767c746f74046f4416db03ef4a31
font_01_sfnt_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 10236 bytes
SHA-256: e1277a5b13c6860ba744ec85f734bb3e31dd59028dd688eb5474f4912755e491

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