Malicious PDF — malware analysis report

Static analysis result for SHA-256 f162b7024bb36a40…

MALICIOUS

PDF

70.2 KB Created: 2021-09-18 03:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a3614d412cb9865c623602c99c8c573e SHA-1: 9194192c5313d2ddb664ecec51ca06297d1d711d SHA-256: f162b7024bb36a402bb14486f5c87e20a1ce0de869c419de4d9ea43c81b67f52
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting and are part of a link farm. This suggests the document is designed to redirect users to malicious content or phishing sites. The ClamAV detection and ML classifier further support its malicious nature, indicating a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6923

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yuemeism.com/uploadfiles/files/fereduz.pdf In PDF document text
    • http://ibconsulting.it/userfiles/files/18147760401.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/48675930746.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/xozufi.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/626ce36c435911b9fa7638855a6b8e7d/87963045862.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/bijepirejosubifiwivumafus.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/68680202419.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/zubusoperade.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/59712367958.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15253760908.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/71897018646.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/75708718807.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/5583800699.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rit6g2cs375rde0cpf5c1igiel/vetemunetoguve.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210910_48946DE87F85C5F4.pdfIn PDF document text
    • http://offerparts.com/upload/files/lodewadoxajemelumaratuxup.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/mozakaloxikimivewirinejak.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/danirapuse.pdfIn PDF document text
    • http://usateatop.com/_upload/files/62563173268.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132107f4f7d9---83316260463.pdfIn PDF document text
    • https://inks.bg/userfiles/file/metaseja.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/tufalotanaji.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcdd37f2a8---49480133918.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613adb0b065ea---supubojufutalude.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3006fa81c78e288a2a7e97956ad5e599/3601712762.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/98461809673.pdfIn PDF document text
    • https://brukspec.pl/upload/file/zetolalebisaguvujib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=robbery+bob+game+apk+downloadPDF 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_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 10852 bytes
SHA-256: eca0a60b8e77b103b476be887c0885921405009fa3a17e5a83b4e575bcc01ae7

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