Malicious PDF — malware analysis report

Static analysis result for SHA-256 33421649fc32e9ff…

MALICIOUS

PDF

95.0 KB Created: 2021-08-15 00:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 10e3f32081ef49bd31184c9fd467c4e4 SHA-1: ee02b77549282c72bb5cc65f7c6dfeb2f21ff082 SHA-256: 33421649fc32e9ff93d6db06aa69aed26a65cc1216b978e0f2c8bbe37b7d31f6
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://on-video.com/movies/movie_data/file/66753314783.pdf In PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608927eca6654---48620664274.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/paresatosuxi.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/kivurasogugoxajod.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/92562062524.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/80180412884.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/14441722917.pdfIn PDF document text
    • http://exima.kr/userData/board/file/86985468093.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/frus22rfsdpt2a8jep4dib2a32/mupiworapumesejanivofabis.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/13022779085.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/49845330211.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161037632f07fd---pulab.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c8f2b26e---befisurelutajen.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bd4cae5d95c---godunedozuwakim.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/bolekugor.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/6a51483965e0e40fa8f2a3e55b9d0912/61737311474.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/j8oh82f6e672jpaossdlt03262/zeremapipumunatojatawoj.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/6cva4fv3k9sang8sct30c4ntn0/25816653421.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/pokesazipobo.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/mubug.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fd3a6592d4c748abfd14a4076e8f4fcb/vefopetapexexagazasosa.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rnelg10pr71p7kgbnf0880r7l4/sitevupad.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/43654943131.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/sefaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=2017+can-am+defender+xt+cab+hd10+specsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7B 18076 bytes
SHA-256: 59d827882920ec54aa060767d3981bbc18b4433def153ca754d1f109425d6127
font_01_sfnt_off00013a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A56 11148 bytes
SHA-256: 340c8b3e299f85dcdfb1e483fa10505eb49f310119a5cb23cd7ad2375f047451
font_02_sfnt_off00015439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1