Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46e93885682e29a…

MALICIOUS

PDF

100.7 KB Created: 2021-09-01 22:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 59903de8fbcc8e6d0573f4175fce9982 SHA-1: 63150a1c48c6f9749e78d7adc6a6ca9594b03555 SHA-256: b46e93885682e29ace40cc14842ed032f10ce35b4b59e657d3174e0233b0ec50
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 malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crysiq.ru/uplcv?utm_term=frank+kane%27s+taming+big+data+with+apache+spark+and+python+pdf PDF link annotation
    • http://mosjob.ru/images/file/85932794448.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210815103752.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe70481bc---rigugugiruvow.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/zibibava.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/17996701079.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/e53f0c8abc995fb9dd970a4861525381/1270885166.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/46750481761.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/72445728794.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/7v4rr1gp4vhakmmdfgv6e23mkb/1588446177.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/70550107720.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160da8bd4a547d---6778065061.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078efe7ade6a---lovifigisixakil.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/68369562895.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/68593355589.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3cb43ac44866db5fb910d27f308dad15/salepobupigivorowedunaba.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/be47f6dc092ba9bb1309b014ed957bc1/1932486510.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/52081475790.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/49609dc96c86f917f0ea1734e434157f/36214606411.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/21397823149.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/94ab5cc5383485490d3ae32673ead503/livuxiwaxenowigo.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ukcuo4arihqjc74ev2n00054f0/16990074805.pdfIn PDF document text
    • http://nrnchina.com/test/images/ckfinder/files/45468737862.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 21380 bytes
SHA-256: c4d863aeb2f72ed913db278c0a687455dd8c9defbb56263c8c01f1af2bcc7314
font_01_sfnt_off0001513e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1513E 11464 bytes
SHA-256: cfc7476c7252b0fde7a026f69fabe65483907e7c3649a7d2b2977a0bda140e32
font_02_sfnt_off00016bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1