Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea53b51c4a9653c…

MALICIOUS

PDF

91.0 KB Created: 2021-07-21 03:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cccacc9dc7e7e3b06ee6787474468b51 SHA-1: 8caf90d4bce5e4f79e7af23af3a92564d8055434 SHA-256: 0ea53b51c4a9653c0b6b72575b52977c4fa7ed67aa2a7db62cf08c184169e4c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute traffic or potentially host malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/45a604d359146e6f2d65f98f11bd6f49/woletives.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843e25d7a83---17684049073.pdf
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/kevufipuxosakodo.pdf
    • http://suvagcentr.ru/userfiles/files/18592035193.pdf
    • http://unsersohn.ch/images/file/rosalexaxenuzor.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160877227a9d3b---83832707730.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081756d21bcf---finofojibewoluboxelu.pdf
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/ginoxoxudagidatelido.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/kt67k4emnivo9csjg9t908g1up/wufovadiluxepumoweto.pdf
    • https://ewastexperts.com/userfiles/files/rarezolu.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2baf84cc0---33850664531.pdf
    • http://atonoserver.com/userfiles/file/22690633299.pdf
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/7141173022.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949152b7e0b---1947919926.pdf
    • http://christschoolblr.in/userfiles/file/39148450624.pdf
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/sitakilojudotavoviwinexel.pdf
    • http://rotang.net/userfiles/file/giminumexosiwenetate.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/707a1f00f33694fbe6ea4398cb38a067/56392414839.pdf
    • http://bioscipublisher.com/files/upfiles/file/josubefatumegajet.pdf
    • http://salkim.com/userfiles/file/40791565571.pdf
    • http://waelfawzy.com/userfiles/file/mojivopefuzusaxupira.pdf
    • https://edubox.mn/uploads/users/0/files/janiluxesarote.pdf
    • https://tanthuantelecom.com/upload/fck/file/gimupubale.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608faa8f5c466---21457430035.pdf
    • https://pmms-online.com/assets/file/24108225532.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73f5721aeb---86443541541.pdf
    • http://omeofest.eu/userfiles/files/ralalati.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=traditional+easter+desserts
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010314.bin
19a1ea3c7abade3e1436ffb90e47b8f131d98e93012e0d69b1cfdc64bfd89065
pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 17112 bytes
font_01_sfnt_off00012f94.bin
79523948dfd1a652653f214cd23339104b1230adfad7d35d3649d5c41627af19
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F94 10204 bytes
font_02_sfnt_off0001468a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1468A 16792 bytes