Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5302f92031b54e…

MALICIOUS

PDF

70.3 KB Created: 2021-09-24 16:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3f760446f8cab1fd088d5b2acc4d0194 SHA-1: f687be597f63b04f5ac452ef4377e3d65de0d9ad SHA-256: 9f5302f92031b54e5ba3e948a7710e2661039e65b33763a5e3641d4ee4653e9a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this purpose, with many distinct hosts and UTM parameters used for tracking. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely intended to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=dracula+dead+and+loving+it+full+movie+download PDF link annotation
    • http://agriturismocorteerbatici.it/userfiles/files/49529511899.pdfIn PDF document text
    • https://e-room.co/userfiles/file/38710053097.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/27280937261.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/jizutoriniwaxew.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/narenononilewugali.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/dazomopamaxidupu.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/xuguvijorepogakox.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/dakovet.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/pajboabh5dl7ps4acih053ljna/86326090242.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/50855760948.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/lasibaduwoluxokeg.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/26591785619.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/verizatovovi.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109140643506594.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/11140846064.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/28747218332.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/31345983009.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/21675146497.pdfIn PDF document text
    • https://aokman-drive.com/d/files/90092308128.pdfIn PDF document text
    • http://moneymaker-gold.de/files/jebapup.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/84011498782.pdfIn PDF document text
    • https://ewt.cz/res/file/22588429518.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/35586250586.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/dulunawuwepugazalorav.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f7d062b80cbadb6f757480b861772075/xobonakusesosoxux.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_off0000b454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC66 15040 bytes
SHA-256: 6b8021607814356bb2b329444cf3acf788aaf07f0ae51667d5c716cf975668ca
font_02_sfnt_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 10904 bytes
SHA-256: a9180e6cecf326c01750e4ad165eeaad784188cd8d431f53dc3bbfc2577ef6d4