Malicious PDF — malware analysis report

Static analysis result for SHA-256 5519772046d88228…

MALICIOUS

PDF

82.6 KB Created: 2021-03-15 03:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 591bb48b4709d77230a44c1e2ba31390 SHA-1: bf3c6b78bc2268142bb9701a73149565a0dde941 SHA-256: 5519772046d88228061d66ec018b524f9688328f5bbcd6eadb590322a48e6e30
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=cobb+accessport+v2+manual
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/eb827ca3333.pdf
    • http://tlgfree.xyz/vapenefodupotenivusulkpopd.pdf
    • https://tifefosejamixin.weebly.com/uploads/1/3/4/3/134370351/aa0bdb.pdf
    • https://cdn-cms.f-static.net/uploads/4419629/normal_602e001071cac.pdf
    • http://wijetaz.mypressonline.com/16130511844.pdf
    • http://rojibitakuvekuw.scienceontheweb.net/bowofotelijetozosirur.pdf
    • https://xojutezakiveze.weebly.com/uploads/1/3/5/3/135318362/pixowitedajemikabewa.pdf
    • https://cdn-cms.f-static.net/uploads/4386336/normal_6041688fb90cb.pdf
    • http://goldstein.capital/package_in_pl_sql_tutorial_point65vm4.pdf
    • http://russianstravel.ru/75536534117m8cmz.pdf
    • http://kengoru.space/tumasavobaf4g0oo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/975eb4f9-597d-47ed-b8a8-c587ecad113f/speed_and_acceleration_calculations_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/5d3fed1d-9e8c-4e8f-b90f-08989649bd5b/xbox_360_controller_driver_win_10_download.pdf
    • https://uploads.strikinglycdn.com/files/aabd2178-0998-4ac6-850e-d4e6f2963142/what_are_the_basic_principles_of_quantum_physics.pdf
    • https://uploads.strikinglycdn.com/files/1c3bc458-1af8-402c-8b45-929a22e6770a/jonononalikivurezipaxode.pdf
    • https://uploads.strikinglycdn.com/files/5b6cbb2f-0456-4aaa-8097-d9c2e6a8b218/vujato.pdf
    • https://uploads.strikinglycdn.com/files/e1b8eb1c-b4e4-4cc9-bc55-98d570de503b/best_offline_video_editor_for_android.pdf
    • https://uploads.strikinglycdn.com/files/e37033c0-8dde-4e94-8d96-1624d1201d74/trane_xr95_flame_sensor.pdf
    • https://uploads.strikinglycdn.com/files/0af3658e-658a-4a3c-8553-d13002ecf529/how_to_build_a_simple_cheap_chicken_coop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010685.bin
0870bef2bd9f1b9e1c2b8342f29f969e2880b9805e8ce29065f0b8f6b0427f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 5316 bytes
font_01_sfnt_off0001187e.bin
709aa402f4bbdd3ad64ee340061c4f82acb93b11fa8ef15ccca26737c023cef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 10644 bytes

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