Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf1213f827c5050…

MALICIOUS

PDF

81.6 KB Created: 2021-03-07 00:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e42af7b12d2ded203b9be4c72225f1a1 SHA-1: 6496fd7c9064234a9c7111ee9a56797491fa3080 SHA-256: 0cf1213f827c50509b6b2ed1884146966db521879e3f6b2b1b4477d19082dbf5
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least one pointing to a disposable domain, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/wix?keyword=wrestling+streaming+websites PDF link annotation
    • http://reduslim-ufficiale.website/514483720684p51w.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/gzisUOE/36639201148.pdfIn PDF document text
    • http://salebox.shop/ball_and_brick_gamebzzbf.pdfIn PDF document text
    • http://smartcreditcheck.info/what_are_the_most_misused_wordsosxr2.pdfIn PDF document text
    • http://mklhhhh.space/narujh3hw4.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/hfceezd/kivivekiworemiluv.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/landlord_tenant_agreement_templatedo35y.pdfIn PDF document text
    • http://wownatural.fun/child_care_near_me_open2x1u6.pdfIn PDF document text
    • http://sport-stavki.fun/soravuvemezakupewopem1fjr.pdfIn PDF document text
    • http://gosufogirepejam.22web.org/electrohome_alarm_clock_radio_manual.pdfIn PDF document text
    • http://igme.site/16294850737511jr.pdfIn PDF document text
    • http://floradoma.net/mafevofesulerim24e.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/hjzjyhe/town_of_hull_tides.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kasabapagikaki.rf.gd/41613338832.pdfIn PDF document text
    • http://feduneve.rf.gd/behavior_intervention_plan_template_doc.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_56aa4040ed0a4291959db9310d0dc368.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/absceso_periapical_cronico.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/1607762641.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_c01a68d6ac3d4eec8c9bb43aa055d9cb.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_0eb88e2d45004441ba44b88b5623d011.pdf?index=trueIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_b7b94281204d4fa5b5c33d0c7b463f87.pdf?index=trueIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_9832a570720c4571a59beff6629114db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lawakux/dictionary_app_using_android_studio.pdfIn PDF document text
    • http://xugobenive.epizy.com/dirty_riddles_and_clean_answers.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_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 5252 bytes
SHA-256: fbe371a268ff2157d691400a99def6944c84e33b1578cc600e987c0837578fe8
font_01_sfnt_off000113ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AE 11024 bytes
SHA-256: 7c1e9da0bd617bd8cadca599bc7fe7963fb23b7bab5a250d2db69d5dd47ceb48

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