Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1353246a5d339d…

MALICIOUS

PDF

97.8 KB Created: 2021-06-25 20:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bbadd754c943c0f3a1d2e6da2b2134b4 SHA-1: 2bfd8e44f0e21201d54b1bee277e95153d483771 SHA-256: fa1353246a5d339da5823b553c11360abd4847077899ab1d371165937d4a9cac
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains numerous embedded URLs, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://afra24.com/basefile/afra24/files/13377912736.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838cc02a760---wuriruvigagonomikidimivi.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/fc51dce285bc6bf26d258e7c9b657b6c/lowiso.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25373dc003---vuxagenumok.pdf
    • http://poongdung.com/FileData/ckfinder/files/20210613_AD129B9E00EF878D.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b6d166967---25034507473.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c26099454d8---simaba.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/haqni89ec5usko82m5vhi1muf7/4602795932.pdf
    • http://aliceinformaticasrl.com/user/pages/32724485019.pdf
    • http://zivotzaokny.eu/res/file/zusukaxugiw.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//87870998741.pdf
    • http://bukharaatlanta.com/sites/default/files/file/37320982969.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/7ss6244h9gqcndg4iosq3qtn9e/xasevojo.pdf
    • http://www.odnpoznan.pl/fotki/file/file/68414036437.pdf
    • http://kawoka.com/userfiles/file/wadate.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/b1spf15elkk9hdb0cdtk8ck590/1043561080.pdf
    • http://jrmhandling.nl/upload/file/55108017421.pdf
    • http://www.ufolep-69.com/contenus/files/laruziridipobuj.pdf
    • https://fotoprint.lv/downloads/file/bomirowazusaxonuxuj.pdf
    • http://enotecagaribaldi.it/userfiles/files/83857781460.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41ab42684a---kitifojubibaj.pdf
    • https://angkortaxiservice.com/userfiles/file/gelasenopegofek.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f11f1a785---24169571058.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b78a1da3e---13934599935.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=top+political+pollsters
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D81 16792 bytes
font_01_sfnt_off00013598.bin
8e1de6881365ef00b29e88b9627acdd08a12eaac3dc0cc1613b7111e416b94b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13598 10224 bytes
font_02_sfnt_off00014cb2.bin
12287ba8ef8b55dcf3cb98c8b03e9ecf4fce6e41b320a2e13a7d47fad702e792
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB2 17400 bytes