Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0794b32ad3b65b…

MALICIOUS

PDF

81.6 KB Created: 2021-03-30 16:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe08e664b5489740e6fd9d42e4a8f68d SHA-1: 7ced452a6011a4a48f8826e09b1122ed2f2e80c1 SHA-256: 9a0794b32ad3b65b8687ae76cdac64f1bdd1660f2a88d95b873cf17ee138ab4e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM', with one prominent URL being https://nipisod.ru/award?keyword=lake+tahoe+trail+map+pdf. This suggests the document's primary purpose is to redirect users to potentially malicious or spammy websites. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=lake+tahoe+trail+map+pdf
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/ef2bc5ed715fa.pdf
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/df39e.pdf
    • https://cdn.sqhk.co/tubadaluzafu/igjhjhg/ruliziwenox.pdf
    • https://pojasulexubu.weebly.com/uploads/1/3/5/9/135993084/dugodu.pdf
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/mebupi.pdf
    • https://cdn.sqhk.co/fevazufalul/YihhjjQ/52637469013.pdf
    • https://lipopujowojirew.weebly.com/uploads/1/3/1/4/131408954/zerikupisu-mimoziwawobe-mizozo-mopizofa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/dba061e6-4383-4b16-91e1-4ebd3b5c3249/66859798536.pdf
    • https://uploads.strikinglycdn.com/files/993b42ba-78d2-4e68-bb9f-d7bb2a57d50f/5595721001.pdf
    • https://s3.amazonaws.com/jazofi/nitelujaw.pdf
    • https://uploads.strikinglycdn.com/files/42556b84-ed6a-418b-958f-b87a89436f18/zugubid.pdf
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_5f3dde02fdb84748a4a9c073c076b242.pdf?index=true
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_f4f1e64735ba4ecfacd0428620ed6004.pdf?index=true
    • https://s3.amazonaws.com/zuwosil/new_moon_rituals_2020_may.pdf
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_8ae523cb7c4542ba961000ea982afb2d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d306c834-c069-4690-a968-7fb54f55caeb/suwenugixupumibetotujol.pdf
    • https://s3.amazonaws.com/xakapudakadu/dynamics_365_licensing_guide_november_2019.pdf
    • http://fonenutekosut.epizy.com/survival_food_reviews.pdf
    • https://uploads.strikinglycdn.com/files/eb06076f-f9e3-4461-ac68-04867eb43aee/que_es_distribucion_normal.pdf
    • https://s3.amazonaws.com/roware/55364797255.pdf
    • http://vetuvadoxawiton.epizy.com/array_problems_in_c.pdf
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_d678a6ebe2364c42b40dd6fc02ed1ad5.pdf?index=true
    • http://zinizebaki.epizy.com/how_to_get_unlimited_money_in_farming_simulator_2015_xbox_one.pdf
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_b3b4b415210c400199c3af98af9a87a2.pdf?index=true
    • http://zewedazogiwake.rf.gd/89230805244.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35a.bin
bcb3faea87f3733f2405e0c0e3aaa85d59a3eef8bdbaee6eadfa9031901aac78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 4792 bytes
font_01_sfnt_off000103a6.bin
29373935c1e3fcf030c2169627f79caa5d4f9e0216dc679bc9f15874571833f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 11552 bytes
font_02_sfnt_off00012a90.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A90 4324 bytes

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