Malicious PDF — malware analysis report

Static analysis result for SHA-256 c394530c9b1a0d24…

MALICIOUS

PDF

72.2 KB Created: 2021-09-01 06:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: b42b2c496b34c718c0c026d8cbb8302e SHA-1: eddc487fcc9c63ff6465d6bb33419064e672983c SHA-256: c394530c9b1a0d243f9c5871da2785ee16772603741f8f55c43c272085584c24
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=read+the+beginning+after+the+end+manhwa PDF link annotation
    • https://pima-alarms.net/slicice/file/34249699007.pdfIn PDF document text
    • http://vce34.ru/attachments/file/tavikaxegokosukamamonesed.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c976bf1d421---gapofox.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/wuwitu.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47aeeb3ef2---popuvir.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/sebiverodemujez.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/92a8587efcfde0657223f1fbc4dcb8a0/79541984708.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/18039441292.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a11d520b973---suvukizojebofijemidade.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/32390706444.pdfIn PDF document text
    • http://minhanh.com/files/wapudivi.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/m84306rlst9g5p01ekg7p8icfm/tituluvafusogofal.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/mexorejulokumiwo.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/joravujuxuz.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/4b15e7e6d052d73900ff383753016fc4/dewutivibolinumok.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/fisafesadewutisuju.pdfIn PDF document text
    • http://nktrading.qa/file/files/lutijegubajapasut.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a052952c096---49801250495.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6cbaada0---28644862348.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/74adafe197f24d4d0e1fcc0769ea60f1/69830654796.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/c4bf511e963588aec04fa9a9338cbece/78006206212.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de779b3a931---dumasex.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/runol.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_off0000b9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D7 10740 bytes
SHA-256: a036d7422d216412ac7e4e5ec3c4bfe8845ee1eea45e37f0ad0b4c0c7ebdf77d
font_01_sfnt_off0000d21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 16372 bytes
SHA-256: 9ac95909fc423c95d1bcc28e3e3bebb4eabbe3ccd0fe2f7db6b05054c71ab273