Malicious PDF — malware analysis report

Static analysis result for SHA-256 25af58d9cd52b0c5…

MALICIOUS

PDF

80.4 KB Created: 2021-06-27 10:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80b44fad13a0c6b9e1b0a27efcd56412 SHA-1: f17f55972f991003ce70b8695c0660b13acf1fcd SHA-256: 25af58d9cd52b0c50b0debdbd0d85502b221c06e3b44e19e441701fcc899e783
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links pointing to compromised websites. The heuristics indicate it's a link farm on disposable hosting and potentially a phishing lure. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chcial.ru/uplcv?utm_term=curries+and+cravings
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1be75d455---leforajepetanobexafop.pdf
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/68685702444.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b359643823f---tuxevobabeviruzegibulalex.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b61687600---99039182274.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6552e03c1c---47126252653.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051121517_328096240.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/da66bfda6dfe6ee2fa8f09e3580c8c7e/19770622317.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf49889301---rafogusivi.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/59ajv3vnp47ob2ile0hp3j5pu5/84455001736.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a04a7fcb0---zubibejatabezumalakabetos.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab15bad1faa---84053149518.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0db867b0fbabfb59275b61468692f73c/gejime.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a434cda81b3---rujuve.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/1f48e2f88dbf88fd253126c3d9b197fd/polujavopiretidipekorip.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9d66b046---piguluxoxudunoludukusimi.pdf
    • https://aquatrustfina.com/userfiles/file/9507199771.pdf
    • https://aiaciran.org/cache/fck_files/file/64013496431.pdf
    • http://geyikkimya.com/userfiles/upload/file/50386229959.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cb49f4035---87841716635.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/da5192fac4a0794677d86bc5542c8764/gupomodexerex.pdf
    • http://palami.by/images/file/ritojawilop.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bd9784811---nuzak.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98e07fcbf---gufomikuz.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160729b412ca57---vevopunolova.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d694.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD694 16792 bytes
font_01_sfnt_off0000eea6.bin
170ef5335586f3fb3cd84dcd9ef2adb53a04c08df855a1aff31fcb5df07e683f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 17452 bytes
font_02_sfnt_off00011cb5.bin
420257f527c783eb37544d2ddd368c0dd0763862fe630a0a950a9f9f46ab6750
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB5 10480 bytes