Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ece905a58592544…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 22:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97d6bcc558604a7697975e890dc14588 SHA-1: 662416e06f8bb83f03863cc674c35533b98578fd SHA-256: 2ece905a58592544de8a47f84b3c2d5d69a4b38ac17bbc4f21302a0aa0a08ffa
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to compromised WordPress sites hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware. The presence of a link farm on disposable hosting and the use of UTM parameters suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144e6202454f---54305458341.pdf
    • http://m3hotels.com/userfiles/file/fiwavawonotoze.pdf
    • https://cottingham-group.com/cufiles/files/93522463227.pdf
    • http://lesmashclub.com/imgUpload/files/85315529474.pdf
    • http://daithanhnam.com/upload/files/nagevuwalusewuxavunurava.pdf
    • http://to-kajihan.net/js/upload/files/wirisoredadotominef.pdf
    • https://tattica.byespresso.com/app/webroot/files/upload/files/runojolifobefawubanusotik.pdf
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/34668077345.pdf
    • http://pietrek.com/MARCUS/files/file/57970241317.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/65sfmnj74j9fo0nno5a19um5li/rafimaforonevadijidod.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614481810150e---rodejevafe.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f3fa1856ee5dc7b3b96c549064311a39/zamogosexunujuxosababor.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161408c77da67b---batakamuwuluzawujewolopo.pdf
    • http://olympicburger1988.com/uploads/files/favuregagaseviguke.pdf
    • http://helderlive.nl/ckfinder/userfiles/files/58892087254.pdf
    • http://portalkucharski.pl/app/webroot/media/files/xedopovabogexetepi.pdf
    • http://antifftech.com/uploadfile/file///2021091606072750.pdf
    • https://stiff.pl/ckfinder/userfiles/files/50745939096.pdf
    • https://specializzati.tecnaevolution.it/dataload/ckupload/98685378721.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f260d7e46f---55760475684.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e898b780cdd8fc55ae84ec1dbf4a28c3/sawuxikifavulasazodepez.pdf
    • https://birutelorasin.com/contents/files/72539392620.pdf
    • https://sibconsulting.com/contents/files/43536195894.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=dream+league+cheat+file
    • 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_off0000d677.bin
d75419980c1a04abcac793dd6ce7d69265c913d1299e0ef651a4c1dc1f9475ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xD677 18144 bytes
font_01_sfnt_off0001057e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1057E 16792 bytes
font_02_sfnt_off00011d95.bin
9758c4c18952e4a58ff065eb09aaab472ebdd5662a65de897ba19f721088bfcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D95 10492 bytes