Malicious PDF — malware analysis report

Static analysis result for SHA-256 3671dcb7ffbfbdaa…

MALICIOUS

PDF

76.3 KB Created: 2021-06-10 08:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e0d7656a5a9ff04c31d969de7e5138bc SHA-1: aebfc8fbcfebad289ed38b42859d8867e6391e4a SHA-256: 3671dcb7ffbfbdaaa59e73aff3685f724d1b01905ecd81fe3aa10637f7d0108b
154 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to distribute malicious payloads or redirect users to phishing sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9654

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://archism.ru/uplcv?utm_term=bsc+2nd+year+zoology+book+pdf+download PDF link annotation
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/4e250fb84f25c51f4034f614d974b47a/80623970327.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/35969712820.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e33fbf802---donaloraxevemuw.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/tilesoserenomonesitow.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/g8ovbkisbk1d78porkfnjumg13/99112615006.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a23592d0d14---manixibugawufewefapuxa.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/fofalelaruvuk.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/8bd2ca0d3330ee68d73ddb067f351987/dodosijipepaxezafaku.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607620c903ef7---7446000625.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/wupurevejeradugarizati.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12b0c0a19c---vimebivutufajumete.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b113894a8---14257831391.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/82750471843.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/647iv602ipj4ebv33btqfmdkf7/48142015425.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/lafifike.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/zimirobume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70D 5952 bytes
SHA-256: c7c6735017ad60c7505acffd1a3c4ed2ac4c7cbe13c8145a693fc810ccf36630
font_01_sfnt_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 11124 bytes
SHA-256: 44c659b3b9f73c1cce217f868879b9844eef455dc224214c673e0562a6ff69ec
font_02_sfnt_off000121a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A9 4556 bytes
SHA-256: fd08d1ca6a748d4166d7aaf3540b7435fca4c85d4b7615d176db608fd14f8be4

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