Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb2a385a95cab0b…

MALICIOUS

PDF

74.5 KB Created: 2020-11-26 17:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 603799d8c3b5d9bdf1615b6529e10182 SHA-1: e5febf90e2e2ab139caee91bf2cb9e168bdffd04 SHA-256: 1fb2a385a95cab0bb1ab5016e61cff76910155de2a3c225b233d69164a0e477e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'traffnew.ru', suggesting it is designed to redirect users to potentially harmful websites. The PDF's structure and the presence of embedded links indicate it functions as a link farm, likely for phishing or distributing further malware, aligning with the 'Spearphishing Attachment' technique.

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://traffnew.ru/strik?utm_term=onmund+skyrim+voice PDF link annotation
    • https://papekukikaduli.weebly.com/uploads/1/3/4/3/134361343/4565060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5fac53b19beba.pdfIn PDF document text
    • https://fogoravirekan.weebly.com/uploads/1/3/4/3/134335139/5280471.pdfIn PDF document text
    • https://rutizinudepedo.weebly.com/uploads/1/3/4/4/134483735/dexowel_tapapuluvulu_verej.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/sofiworebuturu.pdfIn PDF document text
    • https://malagabolej.weebly.com/uploads/1/3/4/4/134494973/8241036.pdfIn PDF document text
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/jugele.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/96d41d1c4d73a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_5fac5b1c3b7b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fb4b8e8cead1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5faf8af18b5c0.pdfIn PDF document text
    • https://didokizobu.weebly.com/uploads/1/3/4/7/134711826/1de4ff.pdfIn PDF document text
    • https://sabitafev.weebly.com/uploads/1/3/4/3/134308069/9281760.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/73e87d5d-78d9-423c-8a6b-caabbfb56cb2/digegalekidofobodokak.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_off0000e5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 5096 bytes
SHA-256: e5bcba133bbb4bd1efb59d26dbcd78ae2c1da7e19806257246fb6ec63bc40245
font_01_sfnt_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 11152 bytes
SHA-256: bb6bc883d7643522e879402d0591cd6a5e85ad722ba0426fc43853ba94f10863

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