Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa597d176df4f3f1…

MALICIOUS

PDF

85.6 KB Created: 2021-07-03 15:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 292e5d1837e47afff6ee538e10989fce SHA-1: c796dd29680263c47fc0aa8708af65537e88a50e SHA-256: fa597d176df4f3f110814e198454ca314ed534c5dd69e7dec76baf2a34b18d89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://shriayurvednagpur.org/public/ckfinder/userfiles/files/57744297405.pdf
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/xexetibosojubiwodun.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/rfle6n96k6jng1f9j0d3qm66b9/sivobonipavurutidozujani.pdf
    • https://mintowncoffee.net/uploads/images/files/musuwefelarer.pdf
    • http://chistogood.ru/admin/ckfinder/userfiles/files/bijaralegolebap.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d69c33c695---vavufu.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/583f245759da75b6fa086212478b8830/21960987290.pdf
    • http://www.hgbehringer.de/img/files/files/lanerenabifulikolimar.pdf
    • http://animalscipublisher.com/files/upfiles/file/55548028142.pdf
    • http://azizolace.cz/images/file/nozasubefebovefojesivezaz.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0d9c51c5f8ff62a8b2c365d0b5a060d5/zezapexepulukusizunalanub.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ql9e9341rd7lp2mfiupmsvune5/dubeliv.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914d3b6fd43---8364364853.pdf
    • http://autoscuolemontagna.it/userfiles/files/jisefugilogiki.pdf
    • https://srmhospitalities.com/images/bulk_images/files/dazijopomoxepelebikobalod.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/30c692d86ea56df5f819ffbee3b3ad70/99377550710.pdf
    • http://vtaky.sk/media/file/39728082472.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/da3f0ad91001aeaf74bbc00102a47cfb/40414577413.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0daf959455---xibovejawutez.pdf
    • http://yaeram.com/userData/board/file/nulagisura.pdf
    • http://eau-msu.ru/ckfinder/userfiles/files/26609130727.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/1u152se707oq68a79ps5g7vq26/3721707881.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c7a7ad639---zigunowalufa.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad238423e30---zopufofuveka.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=importance+of+questionnaire+in+research+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cf.bin
90585adda6b3e10c0bc0a6bb9f1627eeb846a284bec1c8bf959c835e2d7cc887
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 11036 bytes
font_01_sfnt_off0001030d.bin
78a673a4a55d8d4c808a84269e2166f4e3e02442910e938307f23fd4bc2e16a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 17460 bytes
font_02_sfnt_off000130ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130CE 16792 bytes