Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe96d5c01c0a31fb…

MALICIOUS

PDF

77.9 KB Created: 2021-09-20 11:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e6dc88b61400a84e1697b0d0e0b2718d SHA-1: 62490cf904f5692e0c90716ad2376fee17d87d2b SHA-256: fe96d5c01c0a31fb6e9cbb826a7a456f9b6f7be7c386cf82dffe65d049ed81c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload storage and disposable domains. This structure is indicative of a phishing or malware distribution campaign, aiming to lure users to malicious websites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7373

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 http://www.tiendadelbordado.com/ckfinder/userfiles/files/2039309735.pdf In PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/vajisinisumejuvekodena.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/gotuxuxula.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9af4879d8c0a130e0f1d9d762355c524/dipudadot.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f492f9c9aafbf37c341ba7d968d39b3/10738737110.pdfIn PDF document text
    • https://esz.jp/img/editor/files/sasezasofotafunize.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/78898739995.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/tagimiwal.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210917065650.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/ramawegedofenevutu.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/diwepubegilusolufapolajom.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/bodotipogafixexifir.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/6j3mavvbq0liq6gedl53a00d23/48965081272.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/812375033.pdfIn PDF document text
    • http://mobilenmr.com/files/files/10369133747.pdfIn PDF document text
    • https://zzhqhi.com/d/files/42295603269.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pr85og8ek5c5a35bvfuuedr131/16016234214.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/nexazamajamadetoj.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/74329727742.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zaguvefogokuniv.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8id0me9ej9qgnavqnbvl75b4v1/75486940252.pdfIn PDF document text
    • https://luminex.pl/upload/file/zazatalopatuvugivobijesa.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/buzexorasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mcq+on+research+methodology+pdfPDF 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_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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