Malicious PDF — malware analysis report

Static analysis result for SHA-256 6597748a5ff2fa20…

MALICIOUS

PDF

72.8 KB Created: 2021-03-07 23:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a8f07396ffddcce5b4caabcb70a87c10 SHA-1: 06dd5b8eba133cdcc1dca945ad8be7d932f91dfe SHA-256: 6597748a5ff2fa20470af6d4817a742acaeca2d0fafaaa8c32444e62f85184f1
126 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic strongly suggest a malicious intent to redirect users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=karima+adebibe+george+lamb PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460447/normal_6003b80150db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_6029311c35ea5.pdfIn PDF document text
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/61c9f2e420fe275.pdfIn PDF document text
    • http://goldenframecollision.com/gizemenitaffdkvt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502567/normal_600172bf9baba.pdfIn PDF document text
    • http://sweetmeet.online/cadette_scout_uniformccil4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_601a03ab6794b.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/59da3df4.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/1409335.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/dagesitaguxira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387706/normal_5ff7ffc3ddc00.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/vudagus-rufoxelid-puruwona.pdfIn PDF document text
    • http://devgm.design/jisufitudeh0.pdfIn PDF document text
    • http://ig-support-service.com/94371809879occs7.pdfIn PDF document text
    • http://azules.ru/another_cinderella_story_scripttom33.pdfIn PDF document text
    • http://kindraretterath.com/23521530135jwa2u.pdfIn PDF document text
    • http://reweder.site/how_to_get_tivo_lifetime_subscription_for_free7ktcl.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/5df3553af.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/sutawowirosuvuv/garfield_2_full_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/gukidisisi.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/litub.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/81051383678.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_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5076 bytes
SHA-256: 09c7086b3c001b9eeeaf10f01b81cdf0bbe5bfd90f2f7019ef796cd7f4083048
font_01_sfnt_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 10764 bytes
SHA-256: 979dcd2595757cbffdaad7b9756a2d80dfe791b3cd38a51ef8e2b16ef81758e1

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