Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f935d4b4852009…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 19:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5946a8cbc3f7a2af76d47da63ec3dba8 SHA-1: d6b529b5b13f2a78411dcd7ca36c2eaa1b22c96f SHA-256: 29f935d4b485200989cc045301be68e6f5b9b1497e6eb9002b93a69cc4147118
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://wsp.pl/userfiles/file/donasapopudupetekesogo.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f3d24b614---rizikizolawesarikixugovut.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd9f70ea8---57590372049.pdf
    • http://wawa757.com/uploads/files/niziv.pdf
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/susiturujo.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a050618263---91680010294.pdf
    • http://crackershrimp.com/file_media/file_image/file/11286146549.pdf
    • http://alnoorcity.com/userfiles/file/tutufopurojap.pdf
    • http://lezeckastenakosice.sk/upload/files/40485610522.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/7o9ciu1lu23f899u6b0vb63v9c/30928728176.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8d409bc134---32239136865.pdf
    • http://stonebreaker.at/47148883671.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e90c1b3df40---munumururot.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/oe8d4fqdvbgnfir60e9hrneja0/69588033786.pdf
    • http://guides2alpes.fr/uploads/file/76623223800.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/salefufetaj.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afcd828d67b---tosaputafesi.pdf
    • http://alituncer.com/userfiles/file/wetuxoloxaribufikuvo.pdf
    • http://one9five.com/userfiles/files/pakedavol.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/560c387b013a7595827bc7b9fdfd41be/vejexiwuwup.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0ab0fa628d6a580817597476ecc35e6e/63169200055.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2943485deceea8a6cd33bcceb42f2d23/filimevi.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e91dc9dd66b---24336845476.pdf
    • https://wolfgang-photography.com/userfiles/files/70099498992.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=arduino+duemilanove+schematic+pdf
    • 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_off0000e17a.bin
18f601c28b8aee260ed683a195b6de708462e13ff9d9aca01c66e70bec359695
pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 17024 bytes
font_01_sfnt_off00010d65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 16792 bytes
font_02_sfnt_off0001257c.bin
94853d81191b063c8bef4bf0521af6d29a67c78cbc27dd990cbbca764b1ef66d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1257C 11032 bytes