Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ebf8066fae9440…

MALICIOUS

PDF

95.8 KB Created: 2021-07-13 08:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 869ef4b75688b8d1c299a7d91c9aae9a SHA-1: 2f1a91c4abf806a8f3491f35274ece6c28d7b94f SHA-256: 24ebf8066fae9440fb411b8f547198736c706e47a56be8dae52e6151569f8764
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, likely intended to host malicious content or phishing pages. The ML classifier also strongly indicated maliciousness, supporting the overall assessment of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160784aca9d1d1---bulanizofuzexesoz.pdf
    • https://kermoulin.com/userfiles/file/11489670243.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b99bc1509---pirosapixujari.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/23ccbd4f75581ce8ebf44be092188947/zetabulibireriwimoki.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c4b3167d3---zubijovubu.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qodanc5o160ucg7oseevu0vec5/vodogagevi.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa82269a198---rumurigalaterotamem.pdf
    • https://vieclamkinhdoanh247.com/upload/files/51477159424.pdf
    • https://pima-alarms.net/slicice/file/30792726070.pdf
    • https://buyafranchise.org/files/files/tuvolewolumewinegakakige.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/5mothmsp8it88n3f660ldj0bhj/rakul.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160802cba552d5---kazeto.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1d89a8ee43a9fec4575978994c93eae0/rumebutigusifad.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/bigojibetagelosixaruput.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098a7fc75ae8---bitabuno.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c36ed37e039ae747ab2b8bafcc07b9bb/befodemavex.pdf
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/gemijurenerulikipame.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160789bd166164---zuluribaweluzaziluj.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160788cb949c0f---36776674448.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db4566a2303---pigasawawupilof.pdf
    • https://amblamy.ee/upload/file/14197437100.pdf
    • http://aliceinformaticasrl.com/user/pages/26013709259.pdf
    • http://www.specemc.ru/upload/files/fewopenopubelow.pdf
    • http://aceonlinementors.com/userfiles/file/15450216451.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=impossible+quiz+answer+11
    • 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_off0001125a.bin
4cac5bbebefb64b061e10544332099ae5a657775eef9e886aba21bb3a5079dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 10848 bytes
font_01_sfnt_off00012b35.bin
fe88c14e8f48e84e7fb822a3a5d57ecf03326905cd46fa07623c4884e83fbf43
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 17728 bytes
font_02_sfnt_off000159e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x159E4 16792 bytes