Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02ff292201caede…

MALICIOUS

PDF

83.0 KB Created: 2021-03-29 19:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c3cd0f0b58e9ef52c6884a510da44a5c SHA-1: 231eda7b04f5fb56ec61620a6fe090259709617c SHA-256: c02ff292201caedede6eafeb855a8ccd7b7d8f963223d8ad8ecfd6c7c6bb952d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a link farm and a lure for clipboard command execution. The embedded URLs suggest a phishing or scam attempt, and the ML classifier strongly flags it as malicious. The primary attack vector appears to be social engineering via the document body, encouraging users to interact with their command line, which could lead to the execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/strik?utm_term=why+does+my+gpu+fan+stop+spinning PDF link annotation
    • http://konalofasu.mywebcommunity.org/can_i_negotiate_car_lease_terms.pdfIn PDF document text
    • https://pagevexositikul.weebly.com/uploads/1/3/5/3/135327712/8a8b3c0152.pdfIn PDF document text
    • http://xovuwut.iblogger.org/fufez.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/97881675248.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/1726233.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/sazozigosaranejezade.pdfIn PDF document text
    • http://didazema.mypressonline.com/zagadumasux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_6ccd32b60cc444c5a7e92ec7967a3a13.pdf?index=trueIn PDF document text
    • http://tuguwobafadurot.rf.gd/61925587593.pdfIn PDF document text
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_ad7a89fa00b741799a0723229a67df3f.pdf?index=trueIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_ce0f0c7865654735acc633ab6acc11b4.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_18493eb58250495380c81cf588d13b4b.pdf?index=trueIn PDF document text
    • http://wudazebej.atwebpages.com/brake_buddy_stealth_reviews.pdfIn PDF document text
    • http://suvuxugoboboju.rf.gd/technical_project_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_8f717c2092ff43c9b455f8393bb4fc14.pdf?index=trueIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/fixizuxukuweduno.pdfIn PDF document text
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_d50f831de31b4043869cf12c99205d0e.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_236de3abfefd45cf9b08f727016ca22f.pdf?index=trueIn 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_off000104b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B2 5440 bytes
SHA-256: 5b6e2e30828a39ebbe38798383d72cfd1fbd29ac420c4fbb3c08c5b79c7c0969
font_01_sfnt_off0001172a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172A 11664 bytes
SHA-256: e418e2bb6e202b2dcc4fe86544af5a3c35a2a4277e44c93a2604e3b853d1ad7d

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