Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6bcbdbc425573b…

MALICIOUS

PDF

77.1 KB Created: 2021-06-27 15:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90446559a90c8f30bc60f767c23e28a2 SHA-1: 132d5a451ffa77526a7eaa40f90cc8d93672001f SHA-256: 0d6bcbdbc425573b23b644388a03ee6511c855f81bd1b81664edc6b03743eba9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to various websites, many of which appear to be compromised or hosted on disposable domains. This behavior is characteristic of a link farm used to distribute malicious content or conduct phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/52g9hq19jv4g6044m4kgu7kja0/febiwidivoviruxulilum.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6671507383---wawufu.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b299a1518e0---16461228377.pdf
    • http://coreaad.com/DreamDataUpload/file/poboxadix.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/97065877603.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/5e55fdd4c0e7c434bb7578fefd85a76d/24609041356.pdf
    • http://spreewaldatelier.de/img/editor/file/wilisefag.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/8gc0abt786b6g2ce6ps91203n0/37914175198.pdf
    • https://termoformat.md/img/files/zifekunib.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3f99cf033---mimisorobagutigi.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/a27mn0si03m9ih3dh4e13t67k7/ximakubi.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16071993d05499---savebosajariz.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/56c7c2d027a2e03e9de72c3ca47ba8c0/97924788568.pdf
    • http://bodegaadrover.com/userfiles//imagenes/73449085300.pdf
    • http://www.tokyomagic.jp/images/library/File/95216042659.pdf
    • https://xlspandoek.nl/userfiles/file/93756603194.pdf
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/69024929426.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607635e70a4cd---didawoza.pdf
    • http://harissarantis.com/userfiles/files/46139627928.pdf
    • http://stoewebdesign.no/userfiles/file/lapalatedewubuwaxivufaj.pdf
    • http://poongdung.com/FileData/ckfinder/files/20210627_79DC6D34B7966067.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160949b431c0b4---xodinuzumuxi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=standard+size+of+kitchen+room+in+meters
    • 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_off0000cc2c.bin
29f92a36b70cf6e5592204456593299d503ddb10f34d3a71e287d9a37b547614
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 16092 bytes
font_01_sfnt_off0000f5ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 16792 bytes
font_02_sfnt_off00010e01.bin
37b1cc7937608908a57d3df3c7dd99b1dfe9045d8f7f4f080f2d0b0607e07c92
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 10924 bytes