Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ec08f27ec52808…

MALICIOUS

PDF

80.5 KB Created: 2021-03-30 19:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d12396cc89efbeb8e5903b7be2ff985 SHA-1: 715735575fdc9446e75bdfe1bdc0e2acd1138b8a SHA-256: c2ec08f27ec52808cab4faf87ced4eb65a5f5f290aa6384727b41bdc92de87e7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result for a common query, likely intended to trick the user into clicking it. The PDF structure itself does not contain executable scripts, but the presence of the malicious URL and the high confidence detection scores indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=how+much+to+replace+tissot+watch+battery
    • https://cdn-cms.f-static.net/uploads/4386335/normal_6021520741719.pdf
    • http://tifusavegapawuf.mygamesonline.org/ceidg_wniosek_2020.pdf
    • http://20970907.net/gadobevalegakzv4by.pdf
    • http://beremoter.online/30665196781qhhi2.pdf
    • https://cdn-cms.f-static.net/uploads/4425501/normal_603a3d98ab886.pdf
    • http://limaxinsto.xyz/budget_spreadsheet_in_excel_free7uhs2.pdf
    • https://static.s123-cdn-static.com/uploads/4387242/normal_5fcad3c286094.pdf
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fcaa4b1ed9b0.pdf
    • https://cdn-cms.f-static.net/uploads/4502175/normal_602675fd3074d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://feferabi.atwebpages.com/bird_photography_tips_and_techniques.pdf
    • https://uploads.strikinglycdn.com/files/bf1d5be9-66ff-44ae-a7c9-b78f8b3fdacf/hunter_fan_remote_not_working_for_light.pdf
    • https://uploads.strikinglycdn.com/files/9d27a0a4-a725-43ca-b22b-884ec8d55b36/21674485206.pdf
    • https://uploads.strikinglycdn.com/files/93598f60-2bc1-48fc-bc1d-fa7e04f4ef03/16661344384.pdf
    • https://uploads.strikinglycdn.com/files/b320dcca-cba1-430c-8869-b44abff059f4/rowenta_steamer_is9100_manual.pdf
    • https://uploads.strikinglycdn.com/files/a42d5f85-4d47-4b69-a5f6-bfa61c4166fe/how_to_test_a_hayward_salt_cell.pdf
    • https://uploads.strikinglycdn.com/files/f0a92bfa-74c9-4ea3-b2ab-911cd3a4de53/mapokixubivasewasuro.pdf
    • https://uploads.strikinglycdn.com/files/d507e0ef-adce-4492-a4ce-11a7fad0a199/john_deere_lawn_mower_maintenance_manual.pdf
    • https://uploads.strikinglycdn.com/files/54e2f367-f8c4-478d-bcb2-6fa5890c0a8e/ipad_mini_2020_review.pdf
    • https://uploads.strikinglycdn.com/files/0b7e08ea-eafc-480f-8f40-95fedd7b7c6d/what_is_the_theme_of_the_highwayman.pdf
    • https://uploads.strikinglycdn.com/files/c5641e8f-7e24-459f-81a7-0af9ae955e7d/criminal_defense_attorney_denver_free_consultation.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_off0000eeaf.bin
ba47fe59156613dc6e7c835294249c2152f1645cfdeb434634d18617707d0133		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 5244 bytes
font_01_sfnt_off00010092.bin
11d970fe355cbbe14932965d144622f3f7eb90b11778e90a8ba9fe1867d8aa16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 10580 bytes
font_02_sfnt_off000124cb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124CB 4324 bytes

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