Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee32c47ddc6fde5f…

MALICIOUS

PDF

70.0 KB Created: 2021-09-01 22:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b64f7060dfa27bde563e18932596e476 SHA-1: 3f7dafeeffa4cca226e0f58a4fef9721980dd694 SHA-256: ee32c47ddc6fde5ff9786e38f44e8be1e411ccfd4cf6e487bdf80dd7ff1cd8cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were extracted, the structure and URL patterns are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://global-brand.net/userfiles/files/fesokabetesow.pdf In PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2173b7a882---zenijogum.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/tapazat.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efdb84db09---tololomorojawat.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/96058285037.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/70232835732.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607143cca5a6f---pesasutexenelitefizoroli.pdfIn PDF document text
    • https://airshow-bg.com/file/vazeladawopagosilimafosew.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/tewelinozuladib.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/sefejamokaju.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/21138037585.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9041e8d24f---joxuboxiboxuvowuzamu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8416629fa---turagede.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/getukuzevives.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160babcfdae474---13240011197.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a953ca378---rinin.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/60c7f54fa0ad1ec04ba6f06cbc647f03/2143295919.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c08232ee---vijosadiret.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/32d8ff672fb4aaaac9c1816997132479/39566914499.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/delejisuwurape.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/40ad258f4238bb37099c9d9fedf9e383/89425789890.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adee8d80d2a---debimigiso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=magnesium+stearate+uses+in+tabletsPDF 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_off0000b3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC07 10564 bytes
SHA-256: dfbdf82f1b3c4203bc785cd550aa9b6e10186d715a905d7f03f7dba1c9daaf7c
font_02_sfnt_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 14704 bytes
SHA-256: fe3c6992c079d27cfcf4a88a03286c3127420fdc9a70361fc2271a1f4873be1b

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