Malicious PDF — malware analysis report

Static analysis result for SHA-256 038f5ccbeb57f33c…

MALICIOUS

PDF

88.1 KB Created: 2021-07-07 21:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce2335b1b94fd991c883ad51b9b9c4a0 SHA-1: 5e5e46617c2c10f2229627024bb9ef44c44b3bf1 SHA-256: 038f5ccbeb57f33cf09c97f69c3ccd76851849b192003368739146da214c7a6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. While no scripts were explicitly extracted, the presence of numerous embedded URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bagiez.com/userfiles/file/15970311559.pdf
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/sosiniguk.pdf
    • http://shreyaghoshal.com/konadnew/userfiles/file/fezosesuvuzelamigokibaxid.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7324a43f6---wunumamani.pdf
    • https://pet-fashion.ro/mm/file/vilapoduberurux.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/c7d7cc348f33e4be0c608085f3fbb7d5/vudibeji.pdf
    • http://zdravi-kromeriz.cz/files/file/44430229190.pdf
    • http://hopkins1983.com/clients/861771/File/19931429486.pdf
    • http://arci-mp.fr/admin/File/fapimakovezufenilepaji.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d3203721e---kebaxogotasunurobiresego.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/ebf07c399a8a3d1ad9df8a2cfeed39ab/34688315691.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/57527902919.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160740db0efd3d---begozolobunowu.pdf
    • http://lubrifianti-auto.ro/files/file/48486586292.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/8ead8f9680decc671979bdda5b0599c2/56846348433.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6ee148aa7---puvemesezawefusituxi.pdf
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/rilum.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/46d7r49htght0feud49gra87l1/35231577965.pdf
    • https://glbtrader.com/userfiles/file/10967842850.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/9c515156b09558498784fcd6ebde201f/kepemefeponeguba.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/125449b9d2b492b482180d977f05a28a/19745795411.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/a0n7cfv0bosc729m80rs5damhh/71335842146.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607affee42ba5---48762224285.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0cb13dc9a628dc2050fa5c5d288b082b/valukujoxekaz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=out+of+darkness+1994+full+movie
    • 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_off0000f2ef.bin
f94a98ac038a17304133c2e74b9bc7059436df34279bed9b578b186247d247ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 11096 bytes
font_01_sfnt_off00010ced.bin
473b41258c02785b8d119449a3a4e93cce71af1ea6466a90fcb1928bd9a84909
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CED 17596 bytes
font_02_sfnt_off00013b21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B21 16792 bytes