Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a06998a2624cb1b…

MALICIOUS

PDF

76.5 KB Created: 2021-08-22 00:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5fea985e4894a888f3fe279e28c3bc49 SHA-1: ba4d2ef565fe3036ee9a9aabe10f88b80cf2cf32 SHA-256: 2a06998a2624cb1b57cfa7ff430fd585f486cc3f88830a51c3474df33639dc02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to malicious content. The presence of external URIs and a link farm suggests an attempt to lure users to external resources, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://paklya.su/design/img/upload/file/49621857392.pdf In PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/dj3ev773159s2fa0df9cjuq394/galipevarogogudofi.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95366800168.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b323930122d---19904648860.pdfIn PDF document text
    • http://usa-ex.com/kepijoxexolul.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/mawupuxobuzavojijuwogadal.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/98154498906.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/8246070280.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/41922063501.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/28965007850.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/362479052.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/seekiin8n60o5oek0653mltkko/xusisojama.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/6341441134.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb1917d0d---65162636977.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/tijuzuda.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ef3075a29---67699687298.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/60208527417.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/pqmli1k9eh9qgei541h7kcsqkq/sozakaxozemokelefajuso.pdfIn PDF document text
    • https://svltv.in/userfiles/files/buzonuvusaki.pdfIn PDF document text
    • http://aplus.to/userfiles/file/wewesodesozolesujajilap.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7d2056f5f---98767932383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=yamaha+outboard+service+manual+freePDF 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_off0000c80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80D 16556 bytes
SHA-256: 4ba6a047ab5d0ac9410c764ce0bccffca772b501507f86fcc2c03a48196a8ebe
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 11032 bytes
SHA-256: af887ea57043f270e33e76c8972c543116f482947d61c600ecadb3afadcbb79e
font_02_sfnt_off00010cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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