Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf6c2d24222b80f…

MALICIOUS

PDF

74.6 KB Created: 2021-06-05 03:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 469705e27f4260511c7257642adb570a SHA-1: 404e9a973e9f026f102f6681614f62f0b482ca47 SHA-256: 0bf6c2d24222b80f6735473bc0d97db0f77eab6905906a2e4746c22dd4144883
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to 'irlanc.ru', suggesting a redirection or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed as a link farm on disposable hosting to obscure malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://irlanc.ru/pbw?utm_term=is+siren+head+really+real PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493881/normal_6029b62fe9198.pdfIn PDF document text
    • https://jagevugabawe.weebly.com/uploads/1/3/4/6/134631244/9222066.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/310528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_5fcd500a28dba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_6042820b4d68d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_600fb4611d2ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368956/normal_6006a475b2052.pdfIn PDF document text
    • https://dibosowosobon.weebly.com/uploads/1/3/7/5/137511826/valoxukolan.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/5dfa1ac5b2.pdfIn PDF document text
    • https://jubonofu.weebly.com/uploads/1/3/4/2/134234671/feda4fb050f4.pdfIn PDF document text
    • https://zamizugupaf.weebly.com/uploads/1/3/3/9/133999186/9743254.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/2010e56c-5c76-40db-8838-3decc9b334f7/62172538313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8a5ee5-aa2b-4be1-acbf-60f806514e61/will_home_warranty_cover_old_hvac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e75110e-fce3-4521-83dd-8d7d4ebdeb4d/73968342040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a8b254-395d-4dbf-9d39-2487d04e44b5/how_to_connect_fire_stick_remote_to_new_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1172f48e-967a-45bf-bf31-2592a7472876/business_development_manager_salaries_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9a5edb-052f-4be4-9ca8-7a80934cc8a9/78830238593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252d73b5-052d-4314-b42c-0d0cc599665a/kefifakeposamu.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_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 4952 bytes
SHA-256: 21277c0834182adc3af630f077fd9a3cdd6ee4a6c60e185674bed4ce6cd3df04
font_01_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 11596 bytes
SHA-256: 9002dab3702aefb377af5c01c91a20749162609ccc59caeae7d7b2116077a653

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