Malicious PDF — malware analysis report

Static analysis result for SHA-256 f396589e48a18f70…

MALICIOUS

PDF

77.9 KB Created: 2021-09-17 00:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6221c2470fbc5aeaefebbaa1f6d84c7d SHA-1: 7c8b58a7477a74090a7cad2c50abf383ad589999 SHA-256: f396589e48a18f70b2f415f8b8a9ce835b479fec3dc144b46d3a6a322e428997
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs, including a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious sites. The PDF structure and embedded URIs align with common phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=south+park+the+stick+of+truth+apk PDF link annotation
    • http://taxfreepoint.com/file/fesimufipozelemugar.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/57242799024.pdfIn PDF document text
    • http://020tzs.com/baige/images/userfiles/file/kigeluzazodavewugivov.pdfIn PDF document text
    • http://belean.pl/userfiles/file/50016505826.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/vijezufanavovowefeziwab.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0d5c053a9---78231736094.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/bixomazi.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/26137559018.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/94089468772.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/nujenetofulenikinot.pdfIn PDF document text
    • http://rapet.hu/files/kowivapogu.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/tezijifatevomujeturafi.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/zixifaxapezulejodosuri.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/rilujakufoteturaguzaxipa.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/buxebuli.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/71536663744.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f01d1dcafb---59802310162.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/somawa.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/jejiritovagutomewojez.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/33403322495.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/88157105290.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/jemanuzutexedudikiregif.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/72478303912.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/77974869240.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_off0000c647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 12896 bytes
SHA-256: 366df567a642942801299c1ee52b0a5cb75ecf35bc264ef6463447272fd9f077
font_02_sfnt_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 16840 bytes
SHA-256: a4072fa7b4690a7936cd9f366b90f635a670d0d82c2fd4dccbe854d06c76f049

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