Malicious PDF — malware analysis report

Static analysis result for SHA-256 c055bcd6702bca8f…

MALICIOUS

PDF

98.5 KB Created: 2021-04-17 06:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7a2fc7f6e1daafed0cc89649806a6f1 SHA-1: 9d880bc289ca877c2d7ee8880a75af5275fbe88a SHA-256: c055bcd6702bca8fb7987157074df8e4a69c80f0e40f64899e281d8e60d11768
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI and the nature of the PDF heuristics suggest it's designed to exploit users via a malicious link, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=tl-wr841n+come+access+point
    • http://naturfresh.space/72310975626rkfuh.pdf
    • http://alcozerox.com/469163520574pu0f.pdf
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/3467435.pdf
    • http://nigma24invest.online/world_political_map_blank_a4_size_printable9c4wq.pdf
    • http://akmurzina.com/hunchback_of_notre_dame_1997_full_motwg0s.pdf
    • http://guworumitikizu.iblogger.org/tegovotatakuda.pdf
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/5926143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kaguzawavor.epizy.com/how_to_study_medicinal_chemistry_easily.pdf
    • http://pajisusag.epizy.com/is_dyson_the_best_vacuum_for_pet_hair.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_ed7b8bb761084454942bf0c2b2cf0c06.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4fc91a1f-1993-4e03-b752-cfef89e054d6/how_many_employees_does_macys_have.pdf
    • http://forawoxo.epizy.com/buxogejezuluraxesuvanar.pdf
    • https://uploads.strikinglycdn.com/files/71d22c7f-070a-4528-af6d-db4c2d0f4a13/what_deep_meaning_does_the_poem_fire_and_ice.pdf
    • http://fuzidix.rf.gd/muduvaporew.pdf
    • https://uploads.strikinglycdn.com/files/0fefc9d6-94b3-4232-928b-6b9187f0dc31/opengl_superbible_4th_edition.pdf
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_39b5ceb891684ce8ad8537980ec23ab1.pdf?index=true
    • http://tipumajusu.rf.gd/7354030866.pdf
    • https://uploads.strikinglycdn.com/files/b605e79e-5298-4e0c-b8f6-2f4a5e37def3/change_master_code_dsc_pc1616.pdf
    • https://uploads.strikinglycdn.com/files/ea1abc0a-0f5a-4e8f-8c2a-d3100131a7fb/when_was_the_apocrypha_taken_out_of_the_king_james_bible.pdf
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_8f6ef6fc564e47aa9db3be3ba14b8ce1.pdf?index=true
    • 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_off0001467c.bin
ae2d2e2fef147230ef7e3753e7a17fe3375ae8d85481f2a310e0f6bc57f427c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1467C 5488 bytes
font_01_sfnt_off00015930.bin
d194c06c12a62316536cf68228fb634a40be3e668b098a1f0b6b290777c991cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15930 10184 bytes

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