Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06d05c4f622e43a…

MALICIOUS

PDF

89.5 KB Created: 2021-08-13 12:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2da7f673c757ce3e0423d43925cbae60 SHA-1: 1ec3dca46d09f3ac5fa78f48a52804a3fad18ba7 SHA-256: e06d05c4f622e43ab5cd3b06eea9154c1fc49039ace072a79eae285d926a28bf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern, likely intended to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=iit+mathematics+books+pdf+free+download PDF link annotation
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/8b5ec6fbd95592b96940e5a358cad870/regodavofepebisusobinaz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aee4b43c98b---67478171216.pdfIn PDF document text
    • http://2440027.ru/upload/file/63143821170.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeba858b578---87310414021.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb542d311---tuwuforifinafik.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/xipaj.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16090b54fd7d69---86525960178.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/goxekurudaxedobi.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607553a028ebe---57740357355.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vebofolebore.pdfIn PDF document text
    • http://kag.fr/userfiles/file/43241369730.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fb6207184dd---dukoxomadawaribusuk.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add49319249---logilel.pdfIn PDF document text
    • http://flexa.cz/docs/file/51421288989.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/r6u1qum8hvi1jl41ic1bg7ng2u/16549568808.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160efee931b417---sumavuwuvaxavaxoke.pdfIn PDF document text
    • http://digifast.cz/userfiles/ledadobabimivuvonivibowo.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///rafunulusitaj.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecc7b1ec8eb---69169583071.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/39218197114.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/31242979172.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/11205d7iqai0imsl0780aipmcp/30420721017.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/60114847615.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/zojuduzanisuj.pdfIn PDF document text
    • http://jaatkinson.com/userimages/59337371958.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_off0000f8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 11152 bytes
SHA-256: b07f0b23609f96f4dc2e26bc3e3cba4d3daf8eeea8ceebfff9bd5bda20908c19
font_02_sfnt_off00012a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A87 17392 bytes
SHA-256: 3666bca85b4f3b021331558844df451df4fb3c471b7860c04be4974b2607bda9

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