Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e75a040c217d1e…

MALICIOUS

PDF

86.6 KB Created: 2021-09-16 12:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1b38c3a67b8837120985629cb3be74d SHA-1: 376438338eae466a76afc759c01f17242c1e9cf5 SHA-256: 84e75a040c217d1efae81f46652bc26d826ed760b3b018bb6ca0110a87cfd451
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to disposable domains and are structured as a link farm, indicating a phishing or malicious download attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b95d29c57f---navedizopovavoxiziwepibuj.pdf In PDF document text
    • https://lifeteacher.tw/uploads/files/202109031157539362.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/2802388244.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/47112311326.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/zarajepajejeraratepanofiz.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/In PDF document text
    • http://swiss-ex.com/images/blog/file/pirutuvixawab.pdfIn PDF document text
    • https://laps.pl/userfiles/file/92596938897.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/53319121533.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b42157be9---wufexolijetekowewaribi.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/mavazinigoras.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/wowepiwopokatixivu.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/8260059175.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/35806539308.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/sotob.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/88653422806.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/45805045548.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/20984464718.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/lelavadiwesetudesa.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/44382247408.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/lugolav.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/tifabunuxegogumodidarep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=market+leader+3rd+edition+answer+key+pdfPDF 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_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 19232 bytes
SHA-256: 3854b29170d8cefa7431fb832dfdb3fb59b25a59443d2ed9a0836bb9a62bb933
font_01_sfnt_off00011b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13328 10948 bytes
SHA-256: 8fa6d2c825587a3a91297ad2dceb29576b38ade9c835846b8aec125103d8f9d9