Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8a74e7f30a916f…

MALICIOUS

PDF

86.9 KB Created: 2021-07-03 11:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9856bc54f8e560e6f8a032916fa919f7 SHA-1: 1fba37e2a6cc1ada33afad750546ab54f08b89a5 SHA-256: 0d8a74e7f30a916f72f934aae6e1104f61487a94a42cfcbf13915b02aab1f5f0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://medvor.ru/uplcv?utm_term=pokemon+emerald+how+to+get+pikachu
    • http://nguoigiupviec99.com/webroot/img/files/rigevotorudereweraxa.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e0405a8792357a4a3e732d2e20d1fb0/sodaponuronegivoxebaf.pdf
    • http://abnicum.com/files/file/dexijinowusudenoroxeb.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c1da797ef---tavexenojudunojezevubon.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608202f893b47---lolakuzeduvigonulamiti.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1f34b000a---dodetamurosomikuvegajiwu.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/269283ae46bf7e494194e5ee299eac66/2892787745.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/138ad55f5195b9b32cad0a95efd6ff72/99418170686.pdf
    • http://dptour.net/bot/ckfinder/uf/files/gosutep.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b825f749f78---jojijuja.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1067dc353b---nosebosefesozak.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d81a5a14c09---perobodorurixa.pdf
    • http://unicaconsultoriarh.com/images/files/kobexukisem.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cacda5af972---xenunebaxalopidobemo.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e0ba8bacc---7515691296.pdf
    • http://coeb.eu/userfiles/files/bevuperaxaz.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d75e432ee---rusagekebo.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/da5qh0i5niathee6j1vcono8la/karowexowisorajoxodiwabe.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d15666e18---lokizi.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/33c780505fc76e56c31b26e6f5a49de1/12800957629.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5bc26cd6064d40530b99f188145e84d8/23037959648.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d58a2e0e18---fopolov.pdf
    • http://gakuso.jp/image/_ckimage_file/genanorezuginisibebizoweb.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 16792 bytes
font_01_sfnt_off0000fef1.bin
969237b101ec576696178f68cc87bfc7c0aa5ad211e4a9357c0056065533f566		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 16712 bytes
font_02_sfnt_off00012a4a.bin
fba2914990d82fec0d80d6c4f3a2e113cd51d1db0e8985b323d1eb83030a6da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 2248 bytes
font_03_sfnt_off00013461.bin
b28c519b60b9125b4f8ab5fbeb629105342ec43558d580489bc22e403dd2d049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13461 11072 bytes

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