Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47cf1ab82fefa05…

MALICIOUS

PDF

69.7 KB Created: 2021-09-29 13:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 90f003e973b2d0f7d80fae5b878b8e1f SHA-1: 6554158e5ee66e283f6551ea8325627122fdb32d SHA-256: d47cf1ab82fefa057c599a77491838d26185768693a99e4c986e1b8bdbabab9f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • 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
  • 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://onsijsselstein.nl/userfiles/files/93499087848.pdf In PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/fajupovuwewubagusitolop.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/41522059863.pdfIn PDF document text
    • http://partiaweb.com/upload/files/niledisosoresibo.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1614e58563c63f---64968746081.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/9983729956.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210928_181350.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/33003752852.pdfIn PDF document text
    • http://arablift.net/userfiles/file/xapilegofufetugaloru.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/92462270958.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/nifunefemimujebesofulu.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c949b09927410a52a56ac7ae0fff1a9f/97501444104.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/zowojozekiz.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/69442830665.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ace57ccec---69557979419.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/wobozobiwosexu.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/fisenabunuzezevomeseja.pdfIn PDF document text
    • http://megalaserasia.com/upload///vikesex.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/24b8fe6eb1d86ee6b742424720504d61/42184094371.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/21612455348.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/7f460992a4ed7fae663d751517174e39/varul.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/f47dbb0cfbb5bf79c469cfcb0ed81ca2/89682976127.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/72035070618.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/mazurakamudu.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/84362926587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mustafa+android+games+free+downloadPDF 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_off0000b065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB065 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87C 10876 bytes
SHA-256: 4d5d8a6065d37a41daf82a9799799af106372de4a448471546fb4dfac2f21400
font_02_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 14940 bytes
SHA-256: 74ef8e4b61b5651918f0b9d791c0a3b63dd3a0bdbf4b737bff8211cb67add078

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