Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bf963eea7f7d6f…

MALICIOUS

PDF

64.8 KB Created: 2021-09-10 14:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: edef42604d8292ef31bf6547bbff7ee4 SHA-1: b3f07dd72dc5d37c1d9e02cee8ee8d21be7ca3c5 SHA-256: 47bf963eea7f7d6fc227a3050b63e4c1bd3d2e84afd2c5cbc07cf412f9f594f3
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution attempt. It functions as a link farm, directing users to various external sites, some of which are hosted on compromised CMS platforms. While no scripts were explicitly extracted, the nature of the link farm and the ML detection suggest potential for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7252

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://alkoplast.rs/files/remeson.pdf In PDF document text
    • https://agros.net/uploads/file/bewipinonad.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/zotofabegirowazi.pdfIn PDF document text
    • https://onlinendttraining.com/files/14509597420.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139f7694bd27---bekun.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613027a5c9496---vipufu.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/safokopudidexez.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d26d28e98---53905285696.pdfIn PDF document text
    • http://hiniceshine.com/upload/fuxixiw.pdfIn PDF document text
    • http://signauction.net/userfiles/file/98063373151.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/kodozosisu.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/dipitakijibasevufikabiwa.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/86699405379.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/82297672167.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/10249303290.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/zuzisiwamikumajowum.pdfIn PDF document text
    • http://wdnederland.nl/file/22782235802.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/85787667634.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210904_AE114A9711A1B396.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/85993798279.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/35107311826.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/49310237048.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/14d0e9b717f372e67dda9f35927fddaf/xarufixiradul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+download+mobdro+on+a+smart+tvPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 17896 bytes
SHA-256: 087e1b0c68005cccba1e449dd0d30f05dfda5a287325e3220f5c012df99de9cc

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