Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe6acae8979261e…

MALICIOUS

PDF

66.0 KB Created: 2021-02-16 05:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8c2cc5b181ab89b53e86b95c2a491040 SHA-1: 0af7028a8a8707bdfd9ec8d64d378fc77a96b83f SHA-256: 6fe6acae8979261e695fd87395b1ffdc06e9694532b4b9cbc13e47b1c2ada366
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. The heuristics indicate it functions as a link farm, directing users to numerous external URLs, many hosted on disposable domains. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to phishing or malware-hosting sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=cristhian+bahena+rivera+trial+date PDF link annotation
    • https://gapikedezasede.weebly.com/uploads/1/3/1/4/131438622/kowatukebimoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_5fd97ac5cffaa.pdfIn PDF document text
    • http://apkweb.net/the_masque_of_the_red_death_allegorical_meaningqi2yn.pdfIn PDF document text
    • https://bazajiwudimikot.weebly.com/uploads/1/3/4/3/134344454/fizumubutewevogake.pdfIn PDF document text
    • https://dipafasimabake.weebly.com/uploads/1/3/1/1/131164320/461e0d9cdb1.pdfIn PDF document text
    • http://trokot-shtorki.online/at_dawn_we_slepttn8vd.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/hbRhcid/bird_paradise_flower_background.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/6258191.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/hxtifje/7978555640.pdfIn PDF document text
    • http://gtomishebs.xyz/facebook_ads_reporting_api7vgs8.pdfIn PDF document text
    • http://znasila.ru/71694061920fymkz.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/objhHgj/fill_up_drill_holes_in_wood.pdfIn PDF document text
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/4012519.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/PhjDgiD/last_shelter_survival_base_layout.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/6X0giZO/juventus_fc_jersey_20_21.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/loxopudizus/suxefe.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/blepharitis_patient_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/usa_today_crossword_answers_may_21.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/blank_handwriting_worksheets_printable.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_off0000c72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72F 5016 bytes
SHA-256: a27fb226e4699323a28dcc528be95309a8be1555cff3c7d06bd471b51f6e6b3c
font_01_sfnt_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 10232 bytes
SHA-256: c6e09720a58a7bbd78f10626338483fa4519f1d09ee8132ccfc027cd7c84ab6a

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