Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcd2d75351bc78f…

MALICIOUS

PDF

84.1 KB Created: 2021-07-02 16:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe7bfdd28042ea5d8f2368979d87ac55 SHA-1: bb0872c685fdc8ed6b3e49b2b4708831d0bdcd77 SHA-256: ebcd2d75351bc78f54c4661cee74156cbcb9e942f3116c57d465edc391b846b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the presence of multiple external URIs and the 'link farm' heuristic strongly suggest a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://infrive.ru/uplcv?utm_term=cure+for+salmonella+food+poisoning
    • http://flexa.cz/docs/file/20363275942.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/45487900325.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160830d2d606d0---95512488192.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/wakinexikejulen.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2c7fdf13a---19943310735.pdf
    • http://kamnitikamini.si/upload/files/15958179098.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3d5dcbfe1b1b23f0258de3aff28c7205/tovobujemajojaxazeluzubox.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984485f0074---jetofe.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609346fa61b6c---pupudexogoxegil.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609127fb3585d---bivenujopaz.pdf
    • http://chinocorporatechallenge.com/clients/6216/File/lijudi.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/38ro7bb6inl1qjr4dm9a3fs5mi/36792328880.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/25233663472.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838cde640d8---rodaresopinaril.pdf
    • http://giasuminhtam.com/Images_upload/files/sufunaror.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5a4b55991---23653860506.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd06d79a6cd---13958695091.pdf
    • http://thedewakohchang.com/image/upload/File/iraxawavotawezidere.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b798c52f5f0---78056374741.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4d19808327336e5daa41324b923c0554/34759626608.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e60ca3955---jekewuropelurotixudagimuw.pdf
    • https://ntwbearing.com/UserFiles/File/89343304915.pdf
    • http://baovephuongtroi.com/vietkiendo/upload/file/logira.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/r725igpequ3b7c0eu496e4c6g3/51259856416.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_off0000e74b.bin
1f7d4c74442d9fdd1e4d40e362d84f2f9f2bcd0dad24b3be404a6649c40bfab1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 16564 bytes
font_01_sfnt_off00011226.bin
c9c2ef1eb228f9545aa8eef388fbe8d3deaa39f132728d3f631c351c188a93df
pdf-font-stream PDF embedded font (sfnt) at offset 0x11226 10872 bytes
font_02_sfnt_off00012b0d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0D 16792 bytes