Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a798b95863e7e0e…

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 04:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 838a324520832c69943b713a33c47cf5 SHA-1: f2bb3d3083c8bcd9f2d53941a79bb34bf09dfa3a SHA-256: 0a798b95863e7e0ee38a1a06d22c9a359d186e73c4b07cad1de799a889cd1e46
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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://landpas.pl/upload/file/xebawosuzikige.pdf In PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/wevunakajopudefofuw.pdfIn PDF document text
    • http://deforma.it/userfiles/files/87760796767.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/747fe93dc4d0be76704c96ba1c6860c4/40653477973.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091117203642.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/gibas.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/gizafimebebewid.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/bejipesado.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/1822851687.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/mutinot.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/af57bcb08d9bb11fb48c75d965cc911f/gegadujexi.pdfIn PDF document text
    • http://findacommodity.com/upload/file/velofivokiwig.pdfIn PDF document text
    • http://njchemland.com/upload/files/50743050787.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/ragilomegovesonuvil.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/likitotujegenaxazerur.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/65964251116.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/40635821060.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/nexibonakonopunowofigomes.pdfIn PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/delinepanaza.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141e7380c34a---89358059105.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109151610385128.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/liteju.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/xasemasavijedoriza.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/gefafewusadimitojojetem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bee+movie+script+copy+and+paste+discordPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10860 bytes
SHA-256: 0cc6f2f4d7af099d0a8ac5109f42fff4059c1c77cc6119b5e26d3bccc7226892

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