Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92d12ded88aca1f…

MALICIOUS

PDF

84.1 KB Created: 2021-06-30 11:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 08b5f1ba2cef10d5dec19e81db33cff6 SHA-1: 894703ec7063f715a097f9175c44c190517c1bdd SHA-256: f92d12ded88aca1f501f3056399fd1fba8c8b2d45e181a6253cda8a3940c1928
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://caribemed.com/userfiles/file/39604352526.pdf In PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/b52f5b72b323df4488d78d25a04af43f/xunasitiz.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63eba1cd7f---99495742708.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/4137046ecbedd3ba35b66c8c7c0eb00e/34047073269.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/chtgqec4qde2mkn95rvgiqtrv3/2526982799.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/fujedajitawekeg.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/pifibamogilifosunasep.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/dutokawikow.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/530ea71b4e7b16c8741a8f25c2cf2578/lunujibetosokexiferunipib.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160793910de7d2---dobizumowesuw.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/517bf79194beda3c64be17bee9e74d4e/1818881028.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e025aa24dd3b8a75073087006f4250fb/23033349366.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/f0fc33003e2496b1f446e0aa90ded2de/36613177220.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608292c782978---31068731481.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbbc379738---zemufobagupu.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/46795075075.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/32489404148.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b47f5c4bb2e6bb92fb7646ca04daafe4/32572375017.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/kt83locmsld7paqcguqfcg4cnc/vasetezak.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/417c3142314b08aea8fe31545ec695b4/tagifofetowukerufaze.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607996578f78a---jipijidikebugaxisefax.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/tifezimelotadukut.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/21395309332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=methane+in+a+sentencePDF 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_off0000e8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C9 10052 bytes
SHA-256: 25f436f271b744430ca14c811356c976e87b8aa79f0de535525d7b84aff39a1b
font_01_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001172c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172C 17600 bytes
SHA-256: 05827686cbb4182fcfc2121f3d7d50b63c79c9ea135bb5a6ef3cdc1dfe8cc022

Open this report in the interactive analyzer, or submit your own file for analysis.