Malicious PDF — malware analysis report

Static analysis result for SHA-256 39027f70433b9248…

MALICIOUS

PDF

62.4 KB Created: 2021-10-01 03:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 41aca0f6c8bb2c2638e369302dc27bf0 SHA-1: 54c5cdf24babf07920137790eab624bd6b1e54d2 SHA-256: 39027f70433b92487fa24e5a179723a22775943ff97c2977737ccdf4563e9390
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as a link farm. ClamAV detection and ML classification indicate malicious intent. The primary attack pattern involves redirecting users to external sites, likely to host phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://tostonet.cl/ckfinder/userfiles/files/badelunisaki.pdf In PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/81640862104.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/bukubifafadomina.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/sivofejotorak.pdfIn PDF document text
    • https://bachson.net/upload/file/jirobigebesok.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/lidilelot.pdfIn PDF document text
    • http://020tzs.com/baige/images/userfiles/file/94971216601.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16144b4bf2314f---fawojogitexojeterunajuxen.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6b194c52d---94398969852.pdfIn PDF document text
    • https://xlquality.com/userfiles/file/76267372016.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/13403998561.pdfIn PDF document text
    • https://seger.cz/userfiles/file/73041704566.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/loxawewupox.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/nubimafazuwukuvutoke.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/19843121205.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/kisadi.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/xegadudunebonajiripib.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/41079507505.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/5214970340.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/todegifu.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/58075337495.pdfIn PDF document text
    • http://rnralpha.cz/res/file/toxusuxikutix.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/19163813347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=mi+11+android+12PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4F 17392 bytes
SHA-256: 90eb7bf706c043ce5c4208003ebdbe6b0d4511ffb96867b8aeaf4b87849e244b

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