Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f62dac469c0940…

MALICIOUS

PDF

78.1 KB Created: 2021-09-10 01:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 403a7760fa5629c32aefa651f48e61a4 SHA-1: ccfbc09e5d2233ebc16e86273b18c9d8977c115c SHA-256: e0f62dac469c09406263b0ade901531854db4f3c9d409b31fc0ea04496c6ddfd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://drafthe.ru/uplcv?utm_term=bhagavad+gita+pdf+in+kannada+with+meaning PDF link annotation
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613372495d3c8---zopisadodekef.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/bilikixi.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/bonagowomixonu.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/nikepafoxosuxe.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/ginezozasedurob.pdfIn PDF document text
    • https://bachson.net/upload/file/sodevimifuxikiwegegomemaf.pdfIn PDF document text
    • http://ladna.pl/user_images/file/77041553073.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/nukogu.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/66242127253.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/80861203738.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/zezunixum.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/47337508922.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/kazexuweruwo.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/xonozotopabug.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/24000700649.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/fidifunarega.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zukapiwonikopajozimova.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/mipojesim.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/zevupiviloloxese.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/53467869026.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/9538186984.pdfIn PDF document text
    • 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_off0000c208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC208 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1F 10808 bytes
SHA-256: 4d3cac7f20068ced4d5a6125d9ab6fd87e0b77d6a1d4c63eea84ae2f765b28f6
font_02_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 21524 bytes
SHA-256: 0870e58af534c1c76848213aa67575bc1505569fb461e81a4b0b88b884bddcb3

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