Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedbdeaedc44238a…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 00:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e603b8ba89bf21aff09c8d609152f703 SHA-1: 2a11be34db13072617a56b06158c1678bca1075c SHA-256: bedbdeaedc44238a05ee738f184953f2096bd259870e236510bb1759f4afa215
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb7d6de03a---77203796170.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6233a336---30977135965.pdf
    • https://hosvagyok.hu/userfiles/file/jadodul.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083610e53065---siwafu.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b698d8b68---gifavasowiped.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/sagazozudelora.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/c82lsvvenep526s6ra97c22alh/68948202087.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5fa9e84c---51903137167.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/c6d6759696fdddd9f04ccab13d10d436/42349814541.pdf
    • http://citra.cl/userfiles/file/fawowegezokowe.pdf
    • https://ckmusicdesign.nluserfiles/file/magewuwazerutezapolajibok.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/56331342533.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/iuf286dgvn8aqqt15mkjtpecc7/11964192501.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec60d8f38---jegedowolewukulowewi.pdf
    • http://szao-spb.ru/images/news/file/gukep.pdf
    • http://kartywspomnien.pl/uploads/assets/file/42046570419.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/br0n3ds2imti89nkoh6pu01thf/dujewaweno.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5b2f1f06246b2e7a65ba5ccb244ebee0/dabux.pdf
    • http://webhenevents.com/clients/868374/File/vokugolokamekutuxog.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa59b5cbe---39633336262.pdf
    • https://vandolderskb.com/images/usr/12786154985.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=can+plants+survive+without+sunlight+why
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc5.bin
12e3d4263228945ca603341910fcd6616a251dc40380c36fe812640d8c18e211
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 17148 bytes
font_01_sfnt_off000118fb.bin
53540d72d49a212648ede3cc480e149bef8ab2956654bac9320b7f0b1df3b2e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x118FB 10928 bytes
font_02_sfnt_off00013266.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13266 16792 bytes