Malicious PDF — malware analysis report

Static analysis result for SHA-256 94340b7ad1b89c13…

MALICIOUS

PDF

107.5 KB Created: 2021-07-21 04:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8a00e46d8a6b115148919ba5301f6d5 SHA-1: 4e719bfe4b334934caf1371a98badb25d26d7956 SHA-256: 94340b7ad1b89c13e5c9830fd91328aa12b9946239d4723b2212282f7290b54e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories and disposable hosting. These links are likely intended to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0102

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 http://sportsgarten.com/editorData/file/13615309239.pdf
    • http://pro-group.ru/userfiles/files/26141041994.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfff096463---81677865207.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/50cd53f366fb08bea081bfa594be6a76/58657940075.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160cade20b6891---bozajojujubojasabe.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608fff36e866b---13445300743.pdf
    • https://ntct-dz.com/ckfinder/userfiles/files/valaduwasuluxojo.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/45dfafeb274b6398b801579f067ee1a5/jelimapefifazu.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/12538e65633118cb3b8b56b4c72e5d7b/galomurexekenizi.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094249b46356---favenurerixerom.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a7ce5206---lamasupuv.pdf
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/94821614258.pdf
    • http://flambotour.it/themes/userfiles//files/mekoxuwesev.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8b329e38---nebatupudidoba.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160745f601e18c---74063498264.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7ec43077b---69638161141.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/8t48u3curo8a3u9ml1i799otfa/sixogunigiso.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee31da4f63---91769061041.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/t5nqh8b2eo9q72o0o0far3lj0u/dedodorugufegojuxuvukika.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609460900d1b7---57424562222.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609639f69bd2c---dakajoreboduxusof.pdf
    • https://comfort8889.com/upload/files/divuxokabojurodoga.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab58e9f2cc6---jitusupogajumajarob.pdf
    • https://bajrahrs.com/userfiles/file/butobevajavulisusepew.pdf
    • http://inwallendorf.de/userfiles/file/62455669394.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+geometric+mean+of+2+4+16+and+32+is
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ba5.bin
329253c28b59e42729476b9b91f8e53531987c78bb6cc16ef664e15e0b7cf308
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA5 19932 bytes
font_01_sfnt_off000160a4.bin
4db151b318487c760b94fd41e858714e99c3faec026dbf0efc253f44e2b0228e
pdf-font-stream PDF embedded font (sfnt) at offset 0x160A4 11432 bytes
font_02_sfnt_off00017b68.bin
4383213c5b04090fb6dba286691365131616295be937159041ad57a033276ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B68 16140 bytes
font_03_sfnt_off000190c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x190C8 16792 bytes