Malicious PDF — malware analysis report

Static analysis result for SHA-256 90de32f95e341889…

MALICIOUS

PDF

93.1 KB Created: 2021-06-26 14:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0bb17d5f605a51ad374610568c87f0db SHA-1: 4a6f02bc7709c6faf704678efc26fab6e5335cdd SHA-256: 90de32f95e34188938c16e22b52168fd829988c07dc85130c88609fb438154ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to compromised WordPress upload storage. Several URLs were extracted, with the majority pointing to potentially compromised sites or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc41d2a8b2f---39633304831.pdf In PDF document text
    • http://al-bandak.com/userfiles/file/fizatiboleruzo.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/a1d42a91dfb4c921086a5ff9e7c5b247/fosazibenorip.pdfIn PDF document text
    • http://mosjob.ru/images/file/gosisevekefa.pdfIn PDF document text
    • https://fallsplat.se/file/bojerufum.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/warubegazokalataleg.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20085b351---savuxenemapamibal.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/10589001245.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f5054ee752d1dce2ad56a2dbc58fefd6/lekefukagosaxugidituv.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/96bff9f328108f1e1ad26a94f054d269/xuwuzozuxobuwuvodob.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e1a4767e---tinosopajaxanetib.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074acd7393f2---lotisaluvaba.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/59ba9dd5e7a40b8788d92704a359ae13/45277348679.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/9sh9svm51kq4nqe7daahu3k7h7/35068902660.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/98979097992.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d90451060313309812860a50304d9d66/gijutatebemitumitoziloxa.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/vetusuzod.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/747a2c01d5a671a9aa72916926c2c957/36935291615.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8b8e94e7---57066440090.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711747838ff---kutojox.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/40209c9460a6d3d21022cbc09a3c884c/tovuzegalexikixisunu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/62400540353.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b8faca609---59396749354.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+silence+of+god+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 10688 bytes
SHA-256: 1268f7381b18a497e6dc7dbaa7a55e24b3c46aa2fd7b60b27be1df41bde195f1
font_01_sfnt_off0001246f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C81 16468 bytes
SHA-256: 278da604d31c13cacb974926e31ee9a8ae672e2f3c423ca15c2cf1f020b95db5

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