Malicious PDF — malware analysis report

Static analysis result for SHA-256 814c569c5893b504…

MALICIOUS

PDF

102.1 KB Created: 2021-08-03 00:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12f5e1caaf8fd39e4a1e9e9c13942fa2 SHA-1: d47467b6b0f04824554a3a04d4efbb2c2dc8952a SHA-256: 814c569c5893b504a1012334ea50c57b4aa679c0765691d7ca24c7bba6e2e4e4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing or malware distribution scheme. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/040fd298383038f187edf79762c1f843/74456092528.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/aa2d4578a86b7e984287f667553d0cbc/1674169673.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3df06ab54b---guwis.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/eb5uiv2tmvlvibf477l52h0r16/pifosokug.pdf
    • https://krone-murten.ch/userfiles/files/nofigigado.pdf
    • https://annjulieskarpmo.com/userfiles/file/gapezajexag.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/28569934720.pdf
    • http://odontoflash.eu/userfiles/files/bumawu.pdf
    • http://beerskiboot.com/img/upload/file/pivuvojiwanofuwa.pdf
    • https://motelandratecuci.ro/userfiles/file/30352554945.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079e9c6d004f---bivasazijugefaj.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/credpib5kelscjgtpdnkr56h95/zutizofog.pdf
    • http://progettogeometra.it/userfiles/files/xerotakatarazazegeli.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/trnaijuhkmb6kmpobb7caro1on/54709572485.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd3531e0a2---99512154097.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfecd97bb23---16814018571.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d770b042a4d---81026539385.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9af5a32e9005c3890003c8b8ccb4ef7d/25917605739.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/86db2d88fda069d9c66f26275a9ab47b/xowadapopilopube.pdf
    • http://robalton.es/Albums/images/file///kojodisazate.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/273535ffff206ab8dcfcd198a2284e3e/37495612751.pdf
    • http://stonebreaker.at/63622326630.pdf
    • http://vuoncotichdep.com/upload/files/88231822213.pdf
    • https://zemtechnika.lt/public/site/0files/7006602195.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c466ac43897---91731242573.pdf
    • http://gptools.net/userfiles/file/51918974195.pdf
    • http://sendedianqi.com/upload_fck/file/2021-6-15/20210615212339566442.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ejemplos+de+mediatriz+en+la+vida+cotidiana
    • 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_off0001245c.bin
806afe6d1b75af5aded17a89e4bf09a6b3088ff603155ea4c0e767449124c368
pdf-font-stream PDF embedded font (sfnt) at offset 0x1245C 19252 bytes
font_01_sfnt_off000155d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155D2 16792 bytes
font_02_sfnt_off00016de9.bin
b335419a62f237df1279722c78077b8e89152f5685594c4a12f53d51583c521b
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE9 10912 bytes