Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb03f507c95fa42…

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 23:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dd952f1a5154e12c92cb7dd852117a2 SHA-1: 858c50f70a108d8f78eb5b28c75a72bedadd135e SHA-256: 2eb03f507c95fa4275203041e9ff42dc577b18c46d8f92c21da3145c00e7e82d
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 a link farm, with many URLs pointing to potentially compromised WordPress upload directories. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded URLs suggest it is designed to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820f36ba3b3---12432258174.pdf
    • http://ndt-tl.ru/upload/file/59573715435.pdf
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/60337810676.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/7ed1ddf9ca881bf0851d26e49a6d7c36/90611748095.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2f06757ed61f6ea0c5d4abeb9c7f96bf/4634012580.pdf
    • http://cy2hand.com/userfiles/risit.pdf
    • http://rafaelokazakov.com/file/76832301485.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ff15084f9---kulowovumixaposidavarojaw.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6528c643c---35921680683.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/aru5dl2tu67olcb259p1kjiul5/tunup.pdf
    • https://gyn-koe70.de/obrazky/file/tixixurawim.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16076206f8fb6a---84968613984.pdf
    • http://gocreate.termall.pl/upload/fck/file/wogenibarufi.pdf
    • http://kayamedbursa.com/userfiles/file/1188104700.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/be453eb0731cc094f8df8e38c27a91ef/58832785179.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/beniwokifizirovokuwerapep.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3ae9a47c---vewokezopesofomavu.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/c946715f47d5bd44c4392f8daa5c229d/botaki.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/lawota.pdf
    • http://polyalpan.hu/_user/file/26524402091.pdf
    • http://iltorg.ru/upload/file/pekazamanexogofowa.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/9b889f1854fb2aa08ffaf8bfa2f5c096/85861828868.pdf
    • https://abeess.com/userfiles/file/46950122452.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+mla+cite+an+anthology
    • 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_off0000fe0f.bin
9dfd4e2ad6ffbef44eae3ee090589a4b52b26ba0dfd8e49be9e589e719a8057c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 10600 bytes
font_01_sfnt_off00011613.bin
0e8ccb41db3fd28f429c8308c469290bf6d91fb45b7fe490b3b4a9d142c14c48
pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 16992 bytes
font_02_sfnt_off0001429a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1429A 16792 bytes