Malicious PDF — malware analysis report

Static analysis result for SHA-256 f969e0ffa990b124…

MALICIOUS

PDF

89.3 KB Created: 2021-08-04 15:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1c24e72133a0edcd5128c91e502b023f SHA-1: 4ac9c340239ac30ec68938fcdf64896bcd3448c0 SHA-256: f969e0ffa990b12402d42317267c42849594f25fae17ae726ca69bc31dbfd89e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document prompts the user to copy and paste content into a command-line interface, a common technique for executing malicious payloads. The numerous embedded URLs, many pointing to compromised WordPress sites, indicate a link farm designed to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/464d780010aa3a8fa8fbfeba4f3326c3/12290043540.pdf In PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/89669141634.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/t3876ki4gvoblivm0v7lg0bqo1/zazaromenologuso.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160893c1fb6416---23089747706.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/43610597830.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/savixu.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/67926041860.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/d1d5e2a8f63b846c875c16ca5784917e/5613512445.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/da8e160fcc7df074cbc1dfb1f385130e/51015787038.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/60533909490.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609693a46e216---17289076260.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/65017283751.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745736ed5dd---zoluwim.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/m9gq4a316qn07jke7jqi29nlfgsqeq38/64626121820.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5fe29cd4603918f166ba7b64ccbdfbcb/xokuxarezilopevagiv.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/5914454032.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/besunu.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/jofogonazozikevu.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609621be9177f---wilifivenuwokogifiwepen.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7dce430f5---gagitefanugonerubarikari.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/sigidurikok.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f17169410---kanumumumer.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/75437198742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=windows+server+2012+r2+iso+download+full+version+freePDF 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_off0000f4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E4 19860 bytes
SHA-256: be9c9655e43a806f2f896b918f5ef9590838fff0ef5e8a6fa3c3e2f58fec8514
font_01_sfnt_off0001265c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E73 10788 bytes
SHA-256: 38e985666c11bdcf06d5e71ac348500c85d4513a997851e0f943dea3b292bb40

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