Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1363b2ed330b6a…

MALICIOUS

PDF

84.7 KB Created: 2021-08-13 18:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 03797d7514c3139c7bad08ed886ee25e SHA-1: 0aed0b610d621738b3a4e434c3c43c0ed2881267 SHA-256: 3c1363b2ed330b6a9de4087c01a412e13505754bbbff9a051ecce68333602028
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of a link farm and the nature of the URLs suggest an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.sport-konyv.hu/userfiles/file/92549119910.pdf In PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a11f6ce5b6f---vitujaxutavagoxovema.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077beccbf25c---23692246358.pdfIn PDF document text
    • http://techhssilverbuffs.com/clients/61416/File/nixebubapulu.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/9s74ed6t0hdt2sicv53uhvhbr0/39311652105.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607955d7ae6b0---gasiroronimibep.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d629f9e5---pigarapafovemepufisakaf.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/bilalemelipetaziz.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/lapusozuwupet.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/2417869520.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/javatuzigixexonejeman.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/molidinisuwetuduwuwokig.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b3c3ecd4---valuk.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/b99mhnminjsen52u13tftton0b/zogafewikugekoxize.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/kewuj.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/48b1a39b332c921ce1308efe95bf92d7/bejeguxesevudisewilokore.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/c44e0236ede427ed4ea4389ba9da9d82/16105218649.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/wivaregizujeji.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610df32d57624---wuxurukubi.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bced3001b---94475725000.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/10695611404.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607246b1ed39f---zodajovugowoti.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba5ed9d52---nufemunowefazis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=appvalley+ios+apkPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 10196 bytes
SHA-256: 721ac6326ecdc1156f9e59908f29d2bec5d30464a028fab723c8a07bab33f44c
font_01_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 17064 bytes
SHA-256: 59a9835c5bb4f3f64795becd2858ac75cc53d196a87fb4b6ae8f766a03cd6141

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