Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2689f98643bd71…

MALICIOUS

PDF

92.0 KB Created: 2021-07-24 12:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78cd830329d42117b592bc4ae7bf74bc SHA-1: 823f00702706ead437b0b7999288ab6c8a1955b7 SHA-256: fa2689f98643bd719fdbadf0c356b0871f88e5b57da2860c0dc51fda740b7748
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://praxis-greve-polley.de/web/editor/files/zutofuxirufotiwade.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ae303d6f91b---57628939718.pdf
    • https://0a3exp.com/upfiles/editor/files/38024438271.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608846ef3242b---72639923605.pdf
    • http://iproperty.ae/userfiles/file/xowalokotifapajilinotusik.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b6e4991fd---tesuwesofawumufipijekad.pdf
    • https://abofahed.com/userfiles/file/gewekunosagunifibubes.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/bisatizaxe.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160982b315403b---pumevajipetoxibu.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b888583a16c---xakitatulamogi.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/o2c2u36t855qpn25g2iej9bbop/goxeve.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/8f4ecdf62df1ec8b24619b99725932ee/puvoketeviwawur.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/34b7611513a35f02d72c3bc7ddd840bc/dawiperujizeluxutezepe.pdf
    • http://gtshotel.it/images/file/satuludigusut.pdf
    • http://asustainable.com/global/file/4977855437.pdf
    • http://pc-driver.ru/userfiles/files/57729884860.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/ffc87eb023d05d07e96610a570d5fbdd/80714899669.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/59d55f2ec68a42fd1950ed6d9d30d26a/jefofatevevodagida.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a323b27e0c7---vipetijebogeba.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/uo8jek2eahb83de9aqpegdf1ar/62990274270.pdf
    • http://cp-tournament.org/ckfinder/userfiles/files/23792613063.pdf
    • http://candientushinko.com/images/file/95064135967.pdf
    • http://anvlaw.com/userfiles/file/96446148875.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef614d5aed---64089167686.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/4a2iactk4koqghjdufbu7s6cvn/jugozizerexilaxiti.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pmp+certification+all-in-one+for+dummies+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
stream_003_off0000d56c.bin
956f0e1c1d253c929324d458ea7c86ab2aad2a270f4d0b91ed5933a38589033a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD56C 24968 bytes
font_01_sfnt_off000101da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 16792 bytes
font_02_sfnt_off000119ec.bin
a281e0bebc928b6162bc89c43718aca69a15ce484b7398b0bc3510bc34a7b279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 16928 bytes
font_03_sfnt_off000145df.bin
4b82e7c88879816bacd30cac667d9714e28feb08a62f7e52ebfd3a2b6430a945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145DF 10916 bytes

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