Malicious PDF — malware analysis report

Static analysis result for SHA-256 a467dcfe667cfee7…

MALICIOUS

PDF

82.7 KB Created: 2021-04-04 02:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 94547a3804379b720a7900eefe6ba9a9 SHA-1: 2640894b0405570cbdf3ab5e3d920ae2ea74d84c SHA-256: a467dcfe667cfee7ba262916bcf863acedd609d5e7d0fa4d91506d1292fc7b0e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including one to 'ponafet.ru', suggesting it functions as a lure to phishing or malware distribution sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/123?utm_term=glyptal+1201+technical+data+sheet PDF link annotation
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/9301472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_6027a3a125128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489056/normal_5fcc207e423d1.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/6ihJjd9/voxubelimogazodolimuvivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_603c2e59eb646.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/dabogepafekumusime.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/WRgiDtZ/kedutolukedabat.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/4952221.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/hhawlO6/craftsy_bag_patterns.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_6044f737d2c1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490746/normal_604ab850431e4.pdfIn PDF document text
    • https://talebizipuvi.weebly.com/uploads/1/3/1/4/131483067/jewiku-jalokuge-dubutusa.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/h0fihQO/bluetooth_serial_terminal_windows_10_download.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/what_is_an_example_of_distance_and_displacement.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/lujolazavijidepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a2e927-4f73-4f10-91ba-6693e2c65c4d/10825065594.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/arabic_language_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/balanced_equations_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/48502168549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cb1516-69bf-40ea-b35f-b3d73affc1ff/tepapugiwobipum.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/makifimakodigubatukuw.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/sazali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d31fe6-543e-46b3-878e-a125d156e5fb/18609721735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8546d7cf-6a27-4043-b3b5-66eb38509ccf/roomba_780_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/saxophone_meme_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 5524 bytes
SHA-256: 108cd1a7b92bad528163b6e857fea0b14900cd5c61eeb2e71fa56f5876d1f71b
font_01_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 11548 bytes
SHA-256: 9116a401b4ce23963a20a2840b23303017769cb8b6d3f5bf3c259b0fa41450e5
font_02_sfnt_off00012811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12811 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd