Malicious PDF — malware analysis report

Static analysis result for SHA-256 005b7832b6e545af…

MALICIOUS

PDF

90.2 KB Created: 2021-06-13 01:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b169d775b939e8f12f5d36f74102df1a SHA-1: d70f6af13277790e8ba024f4e61fd7660980df06 SHA-256: 005b7832b6e545afe6b9baa5bf2098b3719cc8456d75391e331a191b4ee00b30
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'Gta v email treasure hunt locations', likely a lure to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nomylo.ru/uplcv?utm_term=gta+v+email+treasure+hunt+locations PDF link annotation
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/344a5a4a0f67ab131a3d1ce610a9c8b0/fugamaxoxogufixo.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608be7408854c---96596585660.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b25549f2a---43532145230.pdfIn PDF document text
    • https://loctra.net/userfiles/file/67722778550.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a597aaa78836e3c55034215d033f20f0/66496593256.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/dumuxuruvogevewikevarote.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/stgpr71id3sc5dgf59nfh6gmka/60353697416.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/86664976620.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/05b5247295a88156815538b1c5946eee/dukupenitilulugusajonoz.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b637deacbc3---68281849693.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093e61fb04e2---fobonevoxupovese.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160af0f168e82f---61360872645.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1842aae03---17362213446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 5012 bytes
SHA-256: 71459a28077ea30089c211e016ae53ae5f0de5f5ccf7dfd4a20768e6329aab1e
font_01_sfnt_off00012021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12021 13512 bytes
SHA-256: 596b5f5f9d5223fddad1a791539e7d52ff1b019133d971551fd9e5a11c0362bb
font_02_sfnt_off00014c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C50 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361