Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fb46ccdd27ee6c…

MALICIOUS

PDF

78.9 KB Created: 2021-06-19 08:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5b99715a8cf27b02e2bf0a3f74812225 SHA-1: 145e68faa2d2fa91074e2465f63302b64411f51d SHA-256: 87fb46ccdd27ee6c17ceb4d9a0202589a29ea2c1c29cdd10bf3ca10e221c2233
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites, likely intended to host and distribute further malicious content. The document body, though heavily obfuscated, suggests a lure related to downloading a movie, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e88bd43fd---28559472188.pdf In PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/b3d6cb8f1bee4ff9994b3e55b3566dc2/nazotuwo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4fa431367---71489114130.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d2eff1cffcd71b9dc75798ab0935484d/nujujepeximekazefugifake.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a4a9508c5---wubemaravisajikibimimubiv.pdfIn PDF document text
    • https://kristinanamaste.eu/files/wamirovi.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/abed562a91113b92b2e29f0687d47ebb/36198429007.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/18855a17a1f8560b4911566645723b35/tefapubitowonizujo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/gu37isfh8gsgd4hj0vveh8034o/zinijek.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c03033b03a7e5389ee025eab76a9ce72/60189135045.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/3cslom02encfspiejtbd5fbumg/38851466438.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d488c20a88---valopepawopifetofivomeluj.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/3302021233.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/1e1622abf5e6845d083477643ca6e285/mefotebonero.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c342187f8---89215432183.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9699b658b2---69471919492.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b93596ec4679868222d97920d55b6774/roreputozadavolinitos.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=despicable+me+3+download+in+tamilPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ebaa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEBAA 13184 bytes
SHA-256: 6038ceec7caa2f2b6534fe92fd3fe9f679f034599519e503369b1c44c9504efa
font_00_sfnt_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 5520 bytes
SHA-256: f2d560b86363a6c86f0b55e3cb49a1b0a61c6350dec4679e963cae70db1c7b12
font_02_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 11404 bytes
SHA-256: fc8f104ee18f2eabfc677c89e16edf17fa345eb6ab5ae83307291a01d83ac9b4

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