Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2c1ae6a8f6507f…

MALICIOUS

PDF

65.1 KB Created: 2021-09-29 00:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8bfc63e0e68e72b14f4403225007a42f SHA-1: 1d99c2f77271a48faa5dc0034a0fb6fdc38a399c SHA-256: 2e2c1ae6a8f6507f34aceaa4e1e7ba8159d48da482b4adad6fe33a8ffde3ae96
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or spamming operation. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6253

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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
  • 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://cructi.ru/uplcv?utm_term=strong+granny+free+robux PDF link annotation
    • http://studioingtassinari.eu/userfiles/files/15584529852.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16146e9f6216d0---vutosadijo.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210906072500.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/99512008270.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28132453025.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/juzalo.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/giterorawepidenevub.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/cac25173b8cf711f342a684eb4ca07b9.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/zilijukivugokorupazabox.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/rulopinogevanizamofepove.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/gelowitavusut.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/kovibosuforagurivif.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/jejamuvamigizexodirogo.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/ralanerex.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/81021262041.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/65266815836.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/aslq74mt95f7jk5lqd50arpvl7/podibewozimupavis.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/keguwadonewazopipamodo.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/xepozunisijurexomuzu.pdfIn PDF document text
    • http://creationart.hu/files/file/64867815808.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/62886961016.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/mumafuzeniramalimil.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/wegasodokadotawogoxuwul.pdfIn 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_off0000ae63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE63 10612 bytes
SHA-256: a4470df27ae1858067bd639993a17bc253a61031f0d5db8d8f8f18838c741c3a
font_01_sfnt_off0000c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 17616 bytes
SHA-256: 914cccd8fd18208014c4dc2e944f12ccaae96b6d0b62534d1cb7486f3bf29c1d

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