Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefe97a96d1ba22d…

MALICIOUS

PDF

67.2 KB Created: 2020-12-16 01:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4ad3eff49d2d48e1f3806d45d39bae40 SHA-1: 637c12d7bb3a21e102790c5aff0a112751ff73bc SHA-256: eefe97a96d1ba22d1d2f872a36fbbbf40710a6d2107bd861b50062c426003a82
226 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. Notably, it includes a 'Clipboard command execution lure' heuristic, indicating the document instructs users to copy and paste content into a shell, a common technique for downloading and executing secondary payloads. The presence of embedded JavaScript further supports the potential for malicious scripting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/aws?utm_term=python+2.+7+free++for+redhat+linux PDF link annotation
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/lebibitu.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/63cdb128.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/kemojon.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/xosobaku_wujunawik_tokeberu.pdfIn PDF document text
    • https://jimamejovegevag.weebly.com/uploads/1/3/4/5/134593921/66793e4376a4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63029413-c86c-4823-b906-9944ccfd6b93/solving_systems_of_linear_equations_graphically_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63053f49-b157-4f77-a48d-bf0760b9f564/imaginez_3rd_edition_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/google_play_games_free_minecraft.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32a51cd1e280355e2ea57/t/5fcffde72b932d7d61f5c399/1607466473975/27359444661.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/58013897471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc73821-0d33-4622-ae58-304983fc2daa/dungeons_and_dragons_5th_edition_dungeon_masters_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc678639698b02c7f46ff01/t/5fc9ebb56a94db17e49438ad/1607068598179/camo_dipping_patterns.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf628a3f75b16643ccebd1/1606378123098/xuvibatatinetibawofe.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_off0000c8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C6 5232 bytes
SHA-256: 15ce97ea29ef8ba246fd7d8c1678ce171f994163e2fdcd327d79e6f3024693c4
font_01_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 10892 bytes
SHA-256: 1934f05b627c0721e64f83cbc14d4e707438c4d35c370872636b706776814959

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