Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cc9f18b354a4f2…

MALICIOUS

PDF

93.6 KB Created: 2021-07-21 23:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 02d848aee41aa16cccaa229a897d4c60 SHA-1: b4bde97d795b3b55e47f5c2c995c68b32450a9e1 SHA-256: 93cc9f18b354a4f247cbd45a0ce3817197582ff05dcd2d73273e9ccb636af88e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/rfhfte6t7ksf9lgkmr5mg90q8u/35217365581.pdf In PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c853c5d5ce---90457340133.pdfIn PDF document text
    • http://paliukenas.lt/i/File/9165489636.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/2ce9603bc59d125aeceb776d0875f621/mizozivufebakupevevaz.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/74156191872.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9bf248b6e---97187065086.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/74793260869.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/95202877196.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce81e108fc8---73931080310.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/10bbf85db26283f97c62393b3ffdcaf4/84398707902.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/12430910157.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417295a741---wubakuxeduguluse.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/vojudamoxibaxereki.pdfIn PDF document text
    • http://patroha.hu/file/raratutu.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/vazevuwa.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb029063b---sipetetasunesudopebebumom.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/24351986202.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077943b29c74---bazejodotodenobidurixodo.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/begupuwerunudezoreziz.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/jb2cvhei82gtl1jmhue5aamdjv/45839743905.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/2257432613.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d33bac55a61---namibasuwufobisezoropato.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/68602462730.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=concede+meaning+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 10648 bytes
SHA-256: 37de396fe5ccb8e7493697ecb20d051cccbaf318963c99835aada815a2dc42e5
font_01_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 16568 bytes
SHA-256: 9e80f2dc1bf7058a35c0544a58eb3e4424f0d34fccfa78ed0b1fd3ed008da9bc
font_02_sfnt_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 19820 bytes
SHA-256: c1442f57f01ec5056e04727553d1038b8b6cc8d209517f174968286a23553031
font_03_sfnt_off00014773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14773 1788 bytes
SHA-256: 2da204dbf5b192a1a02e8151239a090dfe772d87288360d1f0d7ea1fb4ba1c25
font_04_sfnt_off00014fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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