Malicious PDF — malware analysis report

Static analysis result for SHA-256 560e0b19bc5b2fa3…

MALICIOUS

PDF

86.7 KB Created: 2021-08-22 00:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fed864561ce38d8d7e008bc955ed094f SHA-1: 6c99bc3c1fed4a3d177406d03af1e0aab9d212b6 SHA-256: 560e0b19bc5b2fa31fc701af0481e963c5dce16d2e073d2dca2c874f51582212
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, suggesting a phishing or scam campaign. The PDF structure itself is a link farm, designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://chcial.ru/uplcv?utm_term=which+visible+light+color+has+the+longest+wavelength PDF link annotation
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/89b268b55f3cd60a7fe3a98366e5a1c6/futazixumix.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/jisat.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086354f2e81a---zelexaxumepane.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/88439231418.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/gimevuzuledazawalawot.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/63556752606.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/c2ac628ddd27e487ac33dfac39d887d7/sewuzepojagexeka.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/vopaxama.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/79061609541.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/5835284240.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/47808369041.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d965f5048bc---30437055414.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c7c4944c5---82701919572.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/65evio42s7b8qeg5cgtho32qej/20662845842.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///tawotovuvazisorurarezu.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/96478617493.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/pobakoxenelobopi.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/dobasitotogekudiw.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611d69d26c989---venezarowosawitigube.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/romuvid.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/aip99156m2n411v6pico7qom57/navaxogok.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/04f6c7a848e29af1e2b2d977484ee9f8/dizugukojelot.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/li41pr18q9rjdr9eppoj060tl0/gasiwonu.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/beviwe.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/l66uff7oadut56a9p0073cfimk/27217321957.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_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 17280 bytes
SHA-256: 876dc7264186e71a97abdd740a1a20adf476b3187fb118961a3b68ce1590b607
font_01_sfnt_off00011b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B46 10796 bytes
SHA-256: 4c5ea8f7c339df22ed850df6d1bf7221b71441c8ae3b59a1530a910837fadccf
font_02_sfnt_off00013433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13433 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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