Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e234f53fee0afe…

MALICIOUS

PDF

76.0 KB Created: 2021-05-24 03:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dbaca0ecd81b8ebf610ea1f776cc9f54 SHA-1: ec6c2bbad6ec96c7909c264a1d7d73ec013e6208 SHA-256: c7e234f53fee0afe6ae8f7e3208b79fa040b79b86529035d4a2483d814dec001
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a disposable hosting domain, identified as a link farm. This suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://lozipotod.ru/strik?utm_term=what+is+pmla+act+2002 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473359/normal_6054e579e49e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_6023bbbd25d13.pdfIn PDF document text
    • https://pilologalegalek.weebly.com/uploads/1/3/0/7/130740349/xagix-nirude-jitotu-dotapewuretun.pdfIn PDF document text
    • https://kanodofeju.weebly.com/uploads/1/3/5/3/135325650/mofizebag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505102/normal_605a54e7dde94.pdfIn PDF document text
    • https://pimusaxasoj.weebly.com/uploads/1/3/1/8/131856122/gewobaziruz-memenum-dugorojewopun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421214/normal_6018d94190258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_606c0ccbb6e7d.pdfIn PDF document text
    • https://xubisimas.weebly.com/uploads/1/3/4/7/134769706/zefesesibev-ragusogapefuw-jesitoxivijuve-zulabanopife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_600ccb3fd6c9f.pdfIn PDF document text
    • https://pubetazona.weebly.com/uploads/1/3/4/5/134584774/3911987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_606e1fbde5325.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/fomudebipefasu/49255830425.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/67750673227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1078f9dd-ae01-43c2-ae5a-6ab0aabbc1eb/62389005585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051d5768-e93a-4ed7-8f76-be0f0db2e0e1/jumalawiwopodezopipure.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/la_biblia_catolica_completa_en_espaol.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_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5364 bytes
SHA-256: 797ad14c009941806bf6c4425eb9d2f4566e063346d64c6581e83feab0e5f7d9
font_01_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 10568 bytes
SHA-256: 3a7512fdd4e5f72a94b2a3b8ba242f0eff72fb81d8a8fcd59383beb8d3588755

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