Malicious PDF — malware analysis report

Static analysis result for SHA-256 c87aac41d6a970f9…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 06:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e356fa82aba41028e9e8251ce56cc2cb SHA-1: d78fa46430e249bf40be667a194f148c5e8c6bf5 SHA-256: c87aac41d6a970f9389e8ca3aba41ea1ed5f7299b23c67f7d0779b59c58bed57
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that is not yet classified, suggesting a potential phishing or malware distribution vector. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure beyond the filename.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://golowaki.ru/award?keyword=biryani+recipe+pdf
    • https://cdn-cms.f-static.net/uploads/4479715/normal_603098a796ae2.pdf
    • https://static.s123-cdn-static.com/uploads/4366032/normal_5fcfedae23e55.pdf
    • https://cdn.sqhk.co/nupopobax/gejjxhe/equipe_terra_hexagon.pdf
    • https://static.s123-cdn-static.com/uploads/4366646/normal_5fd09464594f9.pdf
    • https://cdn.sqhk.co/kigowabalo/TpbiixD/battle_city_1990_nes_rom.pdf
    • https://cdn.sqhk.co/zetuzire/bgjiAhh/10969419869.pdf
    • https://cdn-cms.f-static.net/uploads/4489587/normal_60343b342e442.pdf
    • https://cdn-cms.f-static.net/uploads/4483082/normal_603b8bd184eb8.pdf
    • https://static.s123-cdn-static.com/uploads/4496592/normal_6006b38ccd113.pdf
    • https://cdn-cms.f-static.net/uploads/4452152/normal_603f354948a7c.pdf
    • https://cdn-cms.f-static.net/uploads/4465264/normal_604ed2d010407.pdf
    • https://cdn.sqhk.co/luwibajik/e1djcRA/samsung_galaxy_alpha_phone_cover.pdf
    • https://static.s123-cdn-static.com/uploads/4384150/normal_60028a300783b.pdf
    • https://cdn.sqhk.co/napumefu/aiaWhiO/81362444077.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0e91060a-e767-4311-893e-fc9acde9b2ee/zarumemuparezabodoba.pdf
    • https://18282f24-d4e3-4c19-b4d9-8e3fdaa82145.filesusr.com/ugd/df2b7b_4e862eae3baf41f983ed6107fb959fbe.pdf?index=true
    • https://s3.amazonaws.com/dipafuxe/77740545435.pdf
    • https://uploads.strikinglycdn.com/files/0c938371-08fb-40a7-adec-b39f593758a5/define_structure_with_syntax_and_example.pdf
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_a8a2d875b4fa4dfaa413d3afefb6245d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8920fde7-52e1-4953-ac7c-8c75b6d963ce/42237785435.pdf
    • https://s3.amazonaws.com/neviwove/66787321416.pdf
    • https://s3.amazonaws.com/mulerux/girl_guides_of_canada_trefoil_logo.pdf
    • https://s3.amazonaws.com/fixararololu/70829492004.pdf
    • https://s3.amazonaws.com/vibuvomomuv/arissto_coffee_machine_manual.pdf
    • https://uploads.strikinglycdn.com/files/af5977a0-f755-438b-b894-1c70643f2c5e/how_to_make_dauphinoise_potatoes_with_single_cream.pdf
    • https://uploads.strikinglycdn.com/files/f5b03142-0927-4a55-af9a-e14b8b29c737/67488559878.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_off0000f619.bin
17a773804820bda0841f3a2dfc5d136b19dac33dfbe217151856b879d59933da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 4688 bytes
font_01_sfnt_off0001060e.bin
0eff3742d575a071cb8317d6354a696c6ef8d0cb00e4c14e2fd82d0a6a657f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 10560 bytes
font_02_sfnt_off000129ee.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129EE 4324 bytes

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