Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42d196ad503a5be…

MALICIOUS

PDF

69.9 KB Created: 2021-09-29 06:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 769fac127b35e47d7269f0448fb9bca3 SHA-1: 0754a16fbef3200bdacea61110b8dfb513a273a7 SHA-256: f42d196ad503a5be76d0a1500f3df6e07c140f4d0afeca592c9f301434efe241
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy on disposable hosting, further supporting a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://drafthe.ru/uplcv?utm_term=fifa+21+obb+files PDF link annotation
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ln6iff0ji0jn4eeudkssrtqtr3/90538830385.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/fafizijula.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161404cf935cb9---47767216147.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/5523093935.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/62607378831.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/rarusuzakuzefiba.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/86767290409.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/29279790276.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/gevarurofanakojunidusuk.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/ferinava.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/laxufigo.pdfIn PDF document text
    • http://www.andreapondika.cz/file/tupewelirarepifizij.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210908150019.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210903064818.pdfIn PDF document text
    • http://synfarm.com/upload/files/metil.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/luvopib.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/wemiwevenojuru.pdfIn PDF document text
    • https://petek.biz/resimler/files/77915173830.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/gadozasowozonibalob.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/sasipokusobitef.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/zodip.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/xeravagupuzepopewoxuxodob.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///39002897286.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://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_off0000b0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E5 16600 bytes
SHA-256: f067a971a6e7cdedab57045c822ab8405a9c73ea910af8b50e3facf434823d68
font_01_sfnt_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 10192 bytes
SHA-256: 12e6601372c005dabac0fb7cfe188d14acde6ccaf2b12cb7def13c3fca835242
font_02_sfnt_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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