Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d29aca87e70a14…

MALICIOUS

PDF

80.5 KB Created: 2021-03-25 10:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a04ff0d7475e3a65ff09e7fde76a2202 SHA-1: 27c70fbcede6c7bef39deac4bcd2ea0803befb35 SHA-256: 82d29aca87e70a14063774c88f85bacb6b321c1ea58f449aa342ad3286dc1a4d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including a primary link to 'vilenefex.ru' disguised as a product review. This suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/strik?utm_term=beats+by+dre+powerbeats+3+wireless+sports+earphones+review
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5ff718283a340.pdf
    • https://cdn-cms.f-static.net/uploads/4377909/normal_602b460291d05.pdf
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/rokoguz-ponikexeruf.pdf
    • http://vaxodomafase.22web.org/adverbios_en_ingles_ejemplos.pdf
    • https://lufodeku.weebly.com/uploads/1/3/4/5/134586195/xaxoni.pdf
    • https://cdn-cms.f-static.net/uploads/4460686/normal_6041a852b2792.pdf
    • https://static.s123-cdn-static.com/uploads/4366057/normal_5fe16913bfbdd.pdf
    • https://cdn-cms.f-static.net/uploads/4380854/normal_603b0c712be49.pdf
    • http://giwewewobarijis.22web.org/netflix_movies_offline_ipad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c9a9c63d-13d4-4a16-b764-ebc8b02e06aa/how_to_remove_hard_returns_in_indesign.pdf
    • https://uploads.strikinglycdn.com/files/6e96029c-2202-4dd0-87a6-3547073a5365/48869703754.pdf
    • https://s3.amazonaws.com/rozebofukixus/81585754965.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/53410230064.pdf
    • https://s3.amazonaws.com/kulinisokakewi/after_effects_cinematic_intro_templates_free.pdf
    • https://s3.amazonaws.com/fosalizuzu/how_to_use_transfer_tape_with_printable_vinyl.pdf
    • http://wegoxoxajenugol.rf.gd/blender_character_animation_tutorial.pdf
    • http://sabasil.epizy.com/57990193674.pdf
    • https://s3.amazonaws.com/badodemebo/bam_bam_bhole_ringtone_pagalworld.pdf
    • https://s3.amazonaws.com/kevava/wavepad_pro_mod_apk.pdf
    • https://s3.amazonaws.com/tesodagiwor/platform_bed_with_headboard_attachment.pdf
    • https://s3.amazonaws.com/wewuxuviwar/physics_textbook_grade_12.pdf
    • https://s3.amazonaws.com/kakekojezutok/reynolds_cookie_baking_sheets_parchment_paper.pdf
    • https://uploads.strikinglycdn.com/files/f0ed7140-320e-4772-9bad-5c8beda27ecc/harry_potter_lego_castle_toys_r_us.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_off0000f800.bin
aeb08d2a2a680b34a295a59e86b82a495e8fd377005a63a5a1eeb0c29f18d2f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 5656 bytes
font_01_sfnt_off00010b44.bin
77ae073e75bca2d46d197dc6d9a4bf657f3bc53d99806032173670d3700e31f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B44 11648 bytes

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