Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fe0b83919f2d8b…

MALICIOUS

PDF

82.0 KB Created: 2021-01-03 15:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9381ee0a64a41a7d1f38608690eec4a3 SHA-1: daafd7c9b5a2b263bc119a3a613d4f7e950dcebf SHA-256: b9fe0b83919f2d8ba2f2c6e5507e9d83f4ced9839e09e3d980042b7ae423f1a3
244 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector associated with phishing lures like 'Apple music family plan refund'. The heuristic firings indicate this PDF is part of a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=apple+music+family+plan+refund In PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5fbe52cd40b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f8b5e3dea4fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fa450abc5866.pdfIn PDF document text
    • https://lutilaxo.weebly.com/uploads/1/3/4/5/134599665/ruregonixadoboluma.pdfIn PDF document text
    • https://cdn.sqhk.co/voduzetefir/jiCl9fy/2913294159.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/dipinegizibif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8af338939da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_5fb8a0467b6a5.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/zijiv.pdfIn PDF document text
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/a6339c6ae78a18.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/ijaFgh8/void_pyramid_walkthrough.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/50ebb8b5-bfe4-4315-8ce2-8768494a635a/47679415959.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/33684163482.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_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 5392 bytes
SHA-256: 558d6bb68abca4f33f566efd7d322765f98cc665d0b9fa78964fcfab773b550a
font_01_sfnt_off0001159a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159A 11072 bytes
SHA-256: b36a18771c1c376006ff1d373fe7b9929c2513e0045cc497321f2078ebfeef0a

Open this report in the interactive analyzer, or submit your own file for analysis.