Malicious PDF — malware analysis report

Static analysis result for SHA-256 2667f818b18d7d6f…

MALICIOUS

PDF

70.2 KB Created: 2021-09-06 15:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 02de14d99b0794bc87d56de2a5e375bd SHA-1: b7065f29b5f1ec0cc0b9ab98a4ccd35887b7e65b SHA-256: 2667f818b18d7d6fcd85a1000268fc017d46e8986185c33bb729306db330cb77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://irlanc.ru/uplcv?utm_term=nomenclatura+iupac+dos+alcanos+pdf PDF link annotation
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160811635b6ae3---zapadafe.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/28832124289.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/nekufumevaf.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/fdefb23cc6d25858927da56d9f132020/kugedenesegakulebitas.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/50228991859.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/48262504320.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/192017019086.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/21148005174.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/40590309742.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/xelubifamepegumikusan.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/307a8eaee5ebc13e7eadae4230f20f1b/pudesalijirukagikalado.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/cc6bdd0ca586ed1d558c5c48a24bdf50/24434311968.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/pageviporelitaxofufavamex.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/2327771435.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da47c071b8f---70561204435.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/31238794036.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/sofnq9a7g5lhk3mnasfjpapguo/90223501199.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608244e068cb1---84908537390.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d8e2838a90a1756312b1fa2827404f7f/vixigivewavew.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202108212342311423.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9415937a6---51604289434.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_off0000b0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E1 16376 bytes
SHA-256: 37fbe86f3a76032b103585df8105fd18b946c8c14b14ad73e222afb9b0ab27c7
font_02_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 10860 bytes
SHA-256: 7adccd1acc6896284d515763f829b0c92e0ac3324003589e016fa9624d34987d

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