Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea4c6ec4e0e7a00…

MALICIOUS

PDF

72.0 KB Created: 2021-09-17 07:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f6e9fd5686b37075f3af55f7f55d96f SHA-1: 40ea1a6c5d2e99e6e0df2f58de0e5c841ffe0122 SHA-256: bea4c6ec4e0e7a00537f27d6fd5eea97b2a6c81e6bc1e2349e0ecd21f350714f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://garglob.ru/uplcv?utm_term=vocal+remover+app+for+android+free+download PDF link annotation
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e14b3a64b---rafanitavelibaxe.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/57847772259.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/zatiguvarolisawibide.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/55997674414.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/81506315306.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/milokuzigoxataxu.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/30443314541.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/nigikabor.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/nigajifemusa.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/606380733.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/375e9ba61ac75402514d21b027462392/5015194327.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eedef9a33a---42214466948.pdfIn PDF document text
    • http://mp-journal.com/media/file/wejazibozanetumimaduretan.pdfIn PDF document text
    • http://rescue119.org/userfiles/file/10801075294.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/dajufe.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/16950379951.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/99901048436.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/3925105047.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/feperike.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/lolupewafexas.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/rejexezefowew.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/nagofove.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_off0000b7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F0 10636 bytes
SHA-256: f4063c7b2132c423274d52f38f06dfe0faa202a507e0118342786b056a833519
font_01_sfnt_off0000d03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03F 16472 bytes
SHA-256: 56f016d41f401e399546901fd815c30acacc1da17fcb43a422efe2e14182e0e6
font_02_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1