Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8f5d15d9cbaa35…

MALICIOUS

PDF

79.9 KB Created: 2021-09-09 12:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6b70e5a9e4c78ffdd8fdbe852d0d6328 SHA-1: 7bfba0b725157d87b6841699159a170ee38851a7 SHA-256: ee8f5d15d9cbaa35afcb24f31ac6ca4d4a18d8f690ad63316d18be49c46b513a
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 as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://krisoc.ru/uplcv?utm_term=archery+games+unblocked PDF link annotation
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613914a790198---palimilapodiribepuxup.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a5b62e86a---9650843664.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/7f6d00763d4c97e137763c4ae0c32347/88835594922.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/dalukexerip.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/xamumoxivexavijivepoxat.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/modajotesivoxebuluxubabo.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/73308667463.pdfIn PDF document text
    • http://alles-vom-schreiner.de/userfiles/file/zusulu.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/zesitubareritegamet.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/zomuwabofa.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/2098304764.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/vemupuxuxed.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/duxepifulafasa.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/13922321958.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/wenowekum.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374070dc764---devage.pdfIn PDF document text
    • https://vleek.com/uploads/files/72351000162.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/xodolomonipufeveler.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/nelogaxunowa.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/35187589928.pdfIn PDF document text
    • https://dom-titan.rs/files/fevofelazamitafomubege.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/jaxitapulelosexuzusera.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/sokuludotazelarige.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/wiwokuje.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/dujulud.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/54256509317.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 11052 bytes
SHA-256: fe8764e88204f31fbfcab9dacc83af4714efdfba2f47606be6bfea76b4ee5db3
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 16992 bytes
SHA-256: 4505a4be8962341a2f6ef4a97131b7aebfdb157caab8f004ab52ba020ee5b42b

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