Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a91f04945361534…

MALICIOUS

PDF

84.4 KB Created: 2021-06-27 20:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3e967def3ee7fe090460fb0a88768150 SHA-1: 60261946c8a4ec87be63e666bbd58549db3f9709 SHA-256: 3a91f0494536153401a5d2bc6a3066745a3c84f11a23eb3a63ad4ecb14539ea9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which host other PDF files, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may be intended to trick users into providing passwords for archives, a common tactic to bypass security scanning. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://pistant.ru/uplcv?utm_term=slavery+questions+and+answers PDF link annotation
    • https://agrilaui.com/userfiles/file/magagelunop.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c70e2b3fb---90849183013.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/39462601105.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/64625827555.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/nilaxipifunaluxurobuwoge.pdfIn PDF document text
    • http://megalaserasia.com/upload///29497155948.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098363e48079---pigopawotonugimitusejar.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/68022140798.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/turoxo.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/77536296715.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/53902100846.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/diberudowakin.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/limefiwamenigadikokawon.pdfIn PDF document text
    • http://wernitznigg.at/files/putexugipa.pdfIn PDF document text
    • http://portsreunion2021.com/clients/b/b1/b1889431de095b9710a1303a3c619afc/File/zuxitimefuwivegeb.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/vewujizu.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/d4372919e824638ffb5365f9794fdca6/nejarifusapafupinuxe.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a1848831099---74571330484.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b902e25a561---9011285697.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/kokovabo.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bbca25bfc7d---36769994358.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d98f8d14b---zinosute.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 17336 bytes
SHA-256: 3b63ae3b23325b6607e5f02ad54e0ea7b8a59f44dce469608109b941fb25f863
font_01_sfnt_off00011382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11382 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B99 10828 bytes
SHA-256: 938ae895e4b20159412b8667df8c1055722e28efaa099a47ec384bb3941c83ba

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