Malicious PDF — malware analysis report

Static analysis result for SHA-256 4649712aa73cdab7…

MALICIOUS

PDF

75.6 KB Created: 2021-06-06 12:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5d9f1b502f95c2d8b429b3022cfe0c SHA-1: bcb80801cfd63b7b2767f6609b512b6382b99534 SHA-256: 4649712aa73cdab7a7ecefb28d95a0d32c7621ec148e6c180c12b8ef023954bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://drafthe.ru/uplcv?utm_term=pokemon+moon+black+gba+rom
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/8827e9a67cffb6ac8c4e938f9e65efbf/67922200686.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/27858192761.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1c6f15d0f---72979434542.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16094f2ae6bbbc---81350439326.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/7a79e231423f70a6417d17f69b6ca1ab/32746341032.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rhf0ucl2pk5mf8s9i3cc74q89c/9860647990.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ab47a35b4---82001155764.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/07153636fb25ccc87de7a1acda2049ea/20574574840.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac51abdf994---98099455323.pdf
    • http://coeb.eu/userfiles/files/81871761676.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6796eb788e---dufuwadesisunar.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/4b9cfaf6d21022fea3d3d743eb8b6d6a/xavemagopetuxi.pdf
    • http://aarogyamedico.com/userfiles/file/74923910998.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f375086715---29984441168.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcb582d5d7---tixobudozinunezut.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095f35cb7243---27493031579.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b00454992bd---mevisobirus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f8.bin
8eb242545a3fe1c5cb81f0e7a4d2283e3c2c95cf8ca64d17868751a168eb4da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F8 5148 bytes
font_01_sfnt_off0000f86c.bin
39b4a84bcec2fcbba8bbf5e6f3f214c13f9fa20dbdf33c5170d1a2dfbb3e3a31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF86C 12356 bytes

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