Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0fdc12abb72c74…

MALICIOUS

PDF

69.8 KB Created: 2021-09-08 06:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 27627a1571f4f216f1b260a9e4ba8057 SHA-1: f7095c10d9a866a43c573c27ba1607d597422682 SHA-256: fa0fdc12abb72c74b5ebdfac279172e5381bcae5d3de889e1d447dc4d052dc91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=invitation+letter+sample+for+event+pdf PDF link annotation
    • http://alituncer.com/userfiles/file/57756706999.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/fiwibitebepuxelidawik.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/sagozonikil.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094d0d52e8a6---7841585217.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/300845553.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087120695a6f---safugukajuveseporavumap.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e525d493d87---jufulen.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/86200359099.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0529addc62c1a7a6925c6eebca2bfcfd/suzajisibomevogaxasewa.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da030e30a4---51853666008.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160707ee5d91fc---lironiwovisivalexomef.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160908c5292ce6---xugekazawudedote.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/78s1455pb57mmg5dulerlarfc7/94036349211.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/vedusajaxozipupigex.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/of70t8mrtvfhakihk1ss3734ig/86717527041.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/39932279465.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a8f086ece---59203486959.pdfIn PDF document text
    • https://puppometalli.eu/file/doradono.pdfIn PDF document text
    • http://phillipsbricksalumni.com/clients/56168/File/sabuladataferi.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9eb1d55827b4df0b3aa682081aaf02a6/29964799198.pdfIn PDF document text
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/9210846999.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_off0000b514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB514 14340 bytes
SHA-256: 8b6881e7cd5ff755fbbf155aec5818d0eb04e4d93c0ab322b075ed2d9d4f2bed
font_01_sfnt_off0000d8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 10676 bytes
SHA-256: aacc595fc720376b2b796e800ef43d047a43015c66500d0110ff606cb9b0f169

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