Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b6110ea05f8537…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 14:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 63a92bbf2e668956e726d0600c9fdcf3 SHA-1: 1c1bf4c6f5aa3a22d7b3a0ce55862e49ab7c19b3 SHA-256: 70b6110ea05f8537f14e5b1d830512b4a8ba09635aba7af610c4731e5c8ab38e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The document contains numerous external links, many pointing to potentially compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://adaviestransportltd.com/userfiles/file/gosubifutagov.pdf In PDF document text
    • http://mkngsp.ru/upload/files/xomonamuzulironu.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93547776908.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021090201010273499.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/kagilofadenuwezifavomujiw.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/26082992809.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/jaribefobiku.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/36809154387.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d922595b31---57244857948.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/53289544081.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/lowozebukisidoje.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e079b681f0---marivasi.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/gutiziduxinuv.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139e6077eb87---tepogabi.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/75714188078.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137501d99e7b---bawog.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/xibolebavuraf.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/8479700321.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/28143269740.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2efd44b1b46a4f264005629a7b07e38f/voxoponabenapobesevusifo.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/4215861263.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/72412316726.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/87081896261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=thoptv+app+dowPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 9960 bytes
SHA-256: 71fbd1a30391a86f69ca18eeba32273f8e58e0f092c301f21afd7f0ef71d4281
font_01_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 18252 bytes
SHA-256: 75669e74d41334b1302ec7728857b84d22069d6964990ca377d7ba280ffd3564
font_02_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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