Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e495df83039d354…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 17:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 65994a335eeb6fda94d4e903d5a5b6b7 SHA-1: 7017bcbe9686d3bbed47a93dffed64adb289a716 SHA-256: 3e495df83039d35443673fffa599766efc4ccc0c1d0d415299263ade0962f6e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to numerous URLs hosted on compromised WordPress sites and other disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=gst+all+tax+rates+list+pdf PDF link annotation
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c62f5ac9f0---77287094160.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/gipekewilagoxo.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/49567928384.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/dakopuguribafawudubid.pdfIn PDF document text
    • http://donghocitizenchinhhang.com/uploads/userfiles/file/7703178297.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/18753477468.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608004104cdf2---11828366412.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/07fbaa327a8c3f7ddd961f8e39a68a46/kazilofojomalodur.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/juxujetolagik.pdfIn PDF document text
    • https://thietbigas.net/media/files/juluvumevusisewojudefaso.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/xepamiridutem.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/39595555000.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/0774bfad2bb56e6aa054990140129f32/buwutumomuwodamal.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210816215319_a0644w.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/oblhd97fagqge6rd3oqqecup31/26342153970.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/845cof1ej9pmrff2i0a2igl5u6/dojaxoju.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4277bbfcbf---xekajejabowinax.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/55451662372.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/9494038649.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16089986f08fe1---51311603419.pdfIn PDF document text
    • http://hasyo.net/files/file/butisulipuwaw.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/jevutavusudukijoz.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/zapivajofedoxomaki.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/domaridelakudafoguri.pdfIn PDF document text
    • 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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 18000 bytes
SHA-256: 6f4b30ef603ac1b9059066e4a8723392aba38b63383509dee106713d4349eab8
font_01_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.