Malicious PDF — malware analysis report

Static analysis result for SHA-256 34aadfc0b665919b…

MALICIOUS

PDF

63.7 KB Created: 2021-05-18 01:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bfb120be8c6e4126d3e0d8149c6a9ff SHA-1: de55d0b3326318b4b3453598937badb393604c9b SHA-256: 34aadfc0b665919be240c7034fc5d9444037588f41b31b23c926292ae61d28ef
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to distribute malicious files. The document body, though heavily obfuscated, contains references to 'hack spin coin master 2020 apk ios', indicating a lure for potentially fraudulent or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8599

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d938b8c13a---44351726427.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16079f91f1d4c1---75218935327.pdf
    • http://ahkjt.com/upfile/file/19411402511.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-2/20210502162127597542.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbceccbbf2---60707013821.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0e54203c6416b596ecb57b808ae14fb6/97939719371.pdf
    • https://guapa2.com/admin/fck/file/17349597625.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/0b6417f292a81cf6811cd388908e36f4/70116704819.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/43e2879dfd61a58e4d23b0e860697971/53744198921.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/3fbe2b64b61ad38f4eb2d95bb57c4c7d/58284656092.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/db17e3193cd02f9d144d152f5f0facdc/nuxineneme.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d026835ca9---kikegeribelukisesekikut.pdf
    • https://biocoils.com/img/file/meroxo.pdf
    • http://anthonyvienna.com/sites/default/files/file/61512039555.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609022ca1cfa5---97422279401.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/b620c4a27e5d56fab9156746cd30f3e0/64278258553.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/b0vmi6ar78irb2bjaimadam0ep/kitovore.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/f1d67229f04bbd2e5307f41e04433e0b/pedagulatalovanadogome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=hack+spin+coin+master+2020+apk+ios
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df96.bin
3267e5fd3d8c6cf2a9b541c4af3cfd95d93fdb8a3c2a3fe785c0f52e09bd40ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 5132 bytes

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