Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6747520afd8a79…

MALICIOUS

PDF

80.0 KB Created: 2021-07-31 04:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d4ed6a51f83560fc421e29cfbfb2b43f SHA-1: 9ddd6b8ac5d6ff7dc46190d15665d0c7dc938dff SHA-256: 9f6747520afd8a7985cc7d78cb99ffe099814f04a4c63c30baff62910c93f8e9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8700

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=baixar+whatsapp+gratis+para+celular+lg+android PDF link annotation
    • https://novahealthclinic.ca/userfiles/file/65126522581.pdfIn PDF document text
    • https://faceless.me/userfiles/files/11069637396.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3bebce328d6ef03568f9ece85d195dbb/lixagidozakileb.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093d4f75f9a0---rodaguxemedi.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d99ecbd9d09---76378391797.pdfIn PDF document text
    • http://donelreunion.com/clients/5/59/59051ae02fa593b10ab13f41bf6316a1/File/mikijapil.pdfIn PDF document text
    • http://serting.eu/userfiles/files/kalofabufitamejozinawaw.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/b22ef0afbc8be209901678dd85813f63/64990149676.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160f01b6aee53e---tovopunigajuwewudejaliw.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/dixinapurufebumolavosef.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9c6f3f43ff8e9cb23bf69e803f33f942/kusigo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f9c6625a0---60756032926.pdfIn PDF document text
    • http://jpcadonate.com/clients/4/48/4863a0bac697dd4b44f4a1b1fb44835f/File/dodimarov.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210709085512.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/jutaropaja.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/psd3179fbnvhkvnlkkikgq6062/41705655402.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53aab6c73c---maxosiverumir.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/pulegevapuw.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/gowisijiler.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160872ccf86887---goxepuxofigesas.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210721074521.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9cg4dsfjoo0gu3mbkedkrkm9kj/zololedaxunerotutixarusi.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_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 18956 bytes
SHA-256: bf8dcbae7051b136c459c0caf762cb33a90c222c8eb6d04e77f8acfb7c8e5749
font_01_sfnt_off00011c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 11136 bytes
SHA-256: c59ef9ce18adf6c73d4a2a7d28a60ccb0fd0217d157c8694a4400c9be16506c2

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