Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1fc4922d850925…

MALICIOUS

PDF

77.5 KB Created: 2021-09-03 22:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c2015c6a555c1167f83d91dec28ba92a SHA-1: f03827308a0d89764a1a183aa720bbc03660b6b1 SHA-256: 6d1fc4922d8509252ea4e956e4fa4eae59a9d092e517eb9a0e5a8c6391dfa262
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=too+many+toys+by+david+shannon+pdf PDF link annotation
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105959c53808---karorirofuxutere.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/wukovupimeluvow.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/94183103037.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/18242195235.pdfIn PDF document text
    • https://www.casestilistas.es//ckfinder/userfiles/files/sogefefefirax.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/25939750054.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/691d26813c59cfff2ee41da80dd7c291/98089390521.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102ab3738a1b---terisok.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/betojotezu.pdfIn PDF document text
    • http://chongros.com/userData/board/file/luwufejiludokokibe.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/siwixunamurulusevalisala.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/37291306158.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e4b53f67d---dobuwiwoxomerovaxomima.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7c97eedbe67cca0fe61039a618dabe13/jusuzelebifodezozu.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/lenenepugoparebisaligazog.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611d0ef1dd995---21649475659.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/37d5bc70a71c5ea5ed5f5dca9ba2218b/18711691544.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/6f9822f8b153325f9b77f4349f32520e/45062452501.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/nelugojevakiwedaf.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/buruverezojifarege.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160f3d7fd66843---4391765962.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/lusisotipubiporonaw.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/701993098ab6bdda4b30732b6e4c2f53/badipevofigap.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/dulofenonirijebadorez.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/83689414464.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC990 10768 bytes
SHA-256: f89e0403864dc1f2c0ac082cc4d9a8e6e20932a7c1f1b42ff6114ed1e1f750eb
font_01_sfnt_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 17604 bytes
SHA-256: 0c2282d897fb04af3fe490c900ecfb0f1f9822b02661dfaf15cbcc5faf47ffe8
font_02_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.