Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66beaf7a803d55f…

MALICIOUS

PDF

79.4 KB Created: 2021-06-09 00:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fd25818d87080b1ac7e60207db95ea2f SHA-1: 0b48ad4da4656736be08d1a4b86c10a91ec2a565 SHA-256: e66beaf7a803d55f4268c2301479946b8a7963237741ea4b39c625ff0ce09609
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing given the lure of a "hack". No scripts were extracted, but the document structure and embedded URIs are indicative of a malicious PDF.

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://huntic.ru/pbw?utm_term=pubg+lite+golden+fragments+hack PDF link annotation
    • https://mawuredover.weebly.com/uploads/1/3/5/9/135957038/a85244b2.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/tupizepexup_damigotuvibovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60281030d5f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484122/normal_603e97c229af8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_60052d72c6bb1.pdfIn PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/funizugigoni_tomazazofubeper_foluxakumi_tezadufovokaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_603a6e9637ce1.pdfIn PDF document text
    • https://fugazuxelodurip.weebly.com/uploads/1/3/4/6/134639195/dafodaneweluj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_60bb743e8fe3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5fd6727b4b57a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144579090/exercices_interactions_fondamentales_1ere_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f54575-9938-4f0c-b890-36d2cda522d4/lakuzodeligow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba5d28d-f1a4-48ab-a86d-76e584e27bc0/24866023880.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/f/13963054091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406d4d27-98ca-4b40-96e2-38cb62866e54/metal_gear_solid_2_ps2_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbfb9bb-2441-4b67-8883-f9bb417c20b9/21413613413.pdfIn PDF document text
    • http://bojifimaral.pbworks.com/f/41560603825.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_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 5640 bytes
SHA-256: 6493560d2e7032feb7962f65387a664c053224f30141f913984e7428b55e5efd
font_01_sfnt_off00010a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A51 11540 bytes
SHA-256: 42ff1ec9320d6272b5df507103196f84685f8e363ee9630d56726d5a403de794

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