Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd06928384e69b50…

MALICIOUS

PDF

78.0 KB Created: 2021-09-13 04:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3781c8b536622b0adb3211ba1630d66e SHA-1: e34d66f7fbfc29e42b6f0b632d6bebe3bddfdc20 SHA-256: fd06928384e69b50b0bb9f22e5ce707a4010bdc957fa3c846a2160d672bf34ae
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of JavaScript actions and numerous embedded URLs suggests an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fivetc.net/uploads/files/70031386472.pdf In PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/xapovebuz.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/xuduga.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/25265493862.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/2109122346195922763wvxd.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/jupalorufoziwewisoburajek.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/rugilubi.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bfb0e9b14---zixal.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/090fcc2ed35f7e20f164076e1b04816e/83711435536.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/jafan.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/71064906075.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/82545006740.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/80534954489.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/71687636701.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/dulonitaxawijofozitivi.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/fogom.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/dazujojokiwalomomisaxede.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/kowuvolesubunokinetabipem.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/4358355103.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/venitojoxelesuvukejudal.pdfIn PDF document text
    • http://biomehl.com/images/content/files/5662950483.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/378016295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=batman+the+dark+knight+returns+part+1+streamingPDF 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_off0000c960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC960 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 18456 bytes
SHA-256: 2653a1a95ec9ad1977809926f0f5a21fa8eb3b1a71f0b41330e221151faa6fc7
font_02_sfnt_off00011140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11140 10972 bytes
SHA-256: 8589e0852e069894bf2737a4f013ed9fd1b3325df7f077685932185fea7cd93e

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