Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b3ee5ee65fdf08…

MALICIOUS

PDF

76.0 KB Created: 2021-08-11 05:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f18346985a2998589e6c591120957004 SHA-1: c2c3a006dfdc14e5b7c1dee1af97f937a1b90a99 SHA-256: d3b3ee5ee65fdf08f2c4e735dc1227734409425dff26196f491583a57bfd3a06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/801ae510e4ac9d5f5175098238580ecf/dojapolug.pdf In PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/rf1spqp3ea2u4j5jnmk50rqhhh/18334429672.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/96695302705.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/kegokuvobimaxoted.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/564575d38b83c7fff3b0741240eb2fb0/dibekoxilo.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2154d0ba---supolejowaxirixe.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/tijitileke.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6b8faba3f---kutepojolokozibibidi.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/8584419464.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/51503af03935366d032c02c04928086c/21389326359.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/2665895161.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/5j4v9gt42rk319pafl6e2gblqa/tetifusojav.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/7l14sq871aomlv6rva7dua2ah7/zexajosuxadaxox.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e6a1fbbec93727c8e84bb41aaf6b4469/dosipuwubopo.pdfIn PDF document text
    • http://uco-kampen.com/media/files/milimerikevonor.pdfIn PDF document text
    • http://punaide.com/userfiles/files/18181484987.pdfIn PDF document text
    • http://alkanboya.com/files/file///fojevoza.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/nanon.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/nenabezi.pdfIn PDF document text
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/xekonifegugisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+install+lightning+digital+av+adapterPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC701 16320 bytes
SHA-256: 6b200d3e2fb4de6b3b4a88d582c50f6095d73402ec20823c487d2e6126d55737
font_01_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 10816 bytes
SHA-256: 5e70c58e69f22d86ef315c579722d692dcfe37fcfe73e1377a039ce3b8d36812
font_02_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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