Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95ade9cdb761b0d…

MALICIOUS

PDF

131.8 KB Created: 2021-07-09 09:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39dd1aac4aeae15b39436ad027ccbae5 SHA-1: ac2894d641071eedb65477df5cbf0c19692003ce SHA-256: f95ade9cdb761b0dc2281d41c082ab54ce1adbecc130cfff1be2fe78528c7135
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites, likely intended to host malicious content. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drafthe.ru/uplcv?utm_term=cost+per+kwh+gas
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/69c6niod60k4jnkedcenov86s4/xutigarasewusogevenuvu.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d2e739f32773b455aa7fa6902af8c0ab/dorufenugorokunote.pdf
    • https://responsible-tourism-alliance.com/content_file/files/mixapiroxiw.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c35016bb7e4---bakuweje.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1c9142550c6ad30bb755e3065438004/kimebepisurapifofovirazi.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7993e9203a---meririjedo.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607794891e71e---sikogezo.pdf
    • https://didacostruzioni.it/userfiles/file/64793619777.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4289a7b56---78798786450.pdf
    • http://afgventuregroup.com/cfiles/file/pikununanulebebuviwusuka.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ba59bcae61c---39080457201.pdf
    • http://designbeginnings.com/upload/file/49352579756.pdf
    • http://maskaevlawyer.ru/userfiles/file/91479378560.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768fdb13a98---877885883.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/e81bbf912e53b3753101254664c0f8e9/tivujolozodurijunoto.pdf
    • https://rcvizovice.cz/ckfinder/userfiles/files/ruvugulawi.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/e2dj2jkj4nvbd4ook85p0q0guq/24307850619.pdf
    • http://dyglas.com/userData/board/file/bogalatigarapoxonowawi.pdf
    • http://learnersdigest.org/userfiles/file/80430423588.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/29203158712.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160912fb300fe7---zagumuzemuzol.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/1ba0da5eced21aea594631a519d54c81/losuxenibipegejezo.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019502.bin
88f54c55e7c62323177d1498dc7524a1fa130df842d6b8e2f46fb3f5fa4c94ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x19502 1772 bytes
font_01_sfnt_off00019d67.bin
d01fffc1d71e92522741910014fb4fb5627736c604e37d0ae475461b39967d05
pdf-font-stream PDF embedded font (sfnt) at offset 0x19D67 10500 bytes
font_02_sfnt_off0001b59c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B59C 16792 bytes
font_03_sfnt_off0001cdae.bin
19f6c0c62f642f7153b2dcf8314d774a05d023424aec7eeee165a258368a5cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDAE 20136 bytes