Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb5aedc5b80aecd…

MALICIOUS

PDF

83.8 KB Created: 2021-07-26 14:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1a790c6a423972629884384df7611ff2 SHA-1: 9efd45c3e41c19c99522e2dc8ffc3839a335b4d3 SHA-256: fbb5aedc5b80aecdd122f6f9690734cb2dc587ae542e877899ed835c2e391446
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/693c46lin4os5p5bu8r3filfd4/54561664838.pdf In PDF document text
    • http://mistralizmiryonetim.com/uploads/file/kezorulevogexudimov.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/25fe47d238572e910552a54d4c778380/zotefizilegakokawajex.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/kupar.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/82gl1l9vebkpovl39bnn7c4k3f/58217635913.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/pixazojobupu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/71794105651.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/goduram.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/75ceffd7a709d7b7866d87bd57d851a9/92576895166.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/bsmptmdfkvip063dotalf1ou0l/durubepelenasogujilije.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/6731818733.pdfIn PDF document text
    • http://www.heksan.com.pl/file/95456861833.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/22a183257fb7194563d146e339ce5bc6/raranozij.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/4c09e52d2ddb45e6730d13e1bb5bd95b/49342899450.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7050195644caddd2f87dc65549fb1311/gojoxedut.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b7c5848c---90147067060.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///57812539625.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/vufizerafarenuwawawituv.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/jugebafamijufikesiburug.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607575cf8ce18---lelubovubigefavunosiwu.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/4cb0cc6529bcc9c7ebc9bb49095b89b9/79790606088.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/af58beba6901f69dbbf94b6d95ccf261/dakexeret.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ejercicios+de+comprension+lectora+octavo+basico+con+respuestasPDF link annotation
    • 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_off0000ddf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 11096 bytes
SHA-256: 36c7ea6a1af1bb2ac724b06a0aa8724f1d3c86f4e022359e97db59fd0a8b1cb2
font_02_sfnt_off00010fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA1 18684 bytes
SHA-256: 540a27630c0d2f7cba2e83dcd82f0342fa6a88611b1e41b4c64ff75146984a26

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