Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe30e8c02712b7ce…

MALICIOUS

PDF

87.3 KB Created: 2021-06-25 23:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17f869aa0eba1ddd448bc2a902e90175 SHA-1: b8a1c5c87ac64b792f27a38a7e5604fc3380d852 SHA-256: fe30e8c02712b7ce48f009d997813837f70d40f8145510bee5afba65a5b221a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to external, potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://crewmak.ru/uplcv?utm_term=meaning+of+bureaucrats+in+english
    • http://hum-lucknow.org/test/fckeditor/file/vafotewenawavelunage.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087461c74433---75441199229.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082a63394723---93018080976.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/zolifuze.pdf
    • http://buddhavehicle.com/userfiles/file/62496056809.pdf
    • https://gw21.ch/uploads/userfiles/file/47607907379.pdf
    • http://kezmosas.hu/files/file/82549644043.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0010b303---vuluwupuveko.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/7303773477.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2jnna7p7odp5csp98437cadq71/3829817555.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b214a953264---19539532406.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/fa632b13e3432b1135410afe2c52ef49/dotetuwureganir.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607624ec980c0---wokebidosadawupizup.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/7fc81c93eda00b18d62564a5acd1ba55/17610783967.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78064ca300---56576027279.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609452a41d907---xevizibe.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcae11fe1e---26280299211.pdf
    • https://walkandsmile.com/userfiles/file/degilufatijefirasub.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9f2c5f11ea12cc360423b45395552002/pisemetuxudumo.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3153338ac0---78114571831.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/649ba019979629a9871e1560a0bee252/pinutixagitavewutusojeb.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a999797e7ed---worowizomuvida.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc3cd621f---49589846037.pdf
    • http://j1medical.com/uploaded/file/zoxudadalalurewejapo.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/a7d67369b3c28618d46b8e1dad44566b/94985354805.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_off0000ebb4.bin
9f14f41bd1d13d7c1ac2cc5ffb5d6d2aeabf51612dcee8bd1240e7a26de54f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 18832 bytes
font_01_sfnt_off00011d29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 16792 bytes
font_02_sfnt_off00013540.bin
694da9dbcad7348ffa300e23ef4b943ccc790781dbe489d2f1468c6ef344cf37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13540 10848 bytes

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