Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9691210d78053ad…

MALICIOUS

PDF

85.7 KB Created: 2021-09-07 07:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7959db0c243ce3ec3fffb9b23a6d1a1d SHA-1: 59b5bbd06f788835c32e44d85fe9c52726fb0e53 SHA-256: c9691210d78053ad24f370e2b3fb5bc9f5962d524426c09dd14cf7eabb40b24e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=modern+architecture+kenneth+frampton+pdf+free+download PDF link annotation
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16136d8f24591f---tafiwobesajav.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ef5jibskj4kha4rsg59qsik0h0/25506074384.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/gajosu.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/9234998629.pdfIn PDF document text
    • http://halaljones.com/uploads/files/18678888757.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/jotosi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735f9a4b3c5---josuvomoxupik.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/65960340368.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607618e558db1---16337110624.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f5c1467a4---81106761269.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/vejogetefutuzeterojizi.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083fd3d56125---rafunetuwus.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/46092521718.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/39265732346.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e28daa3e3e---sipurozitawabok.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/89196983550.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83517726e---96014663766.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a623d6016ba---nofisoniramudevorasile.pdfIn PDF document text
    • http://hrudolf.com/userfiles/57997276958.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/94596161537.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/91787254980.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/eau02ff8ncmkk20tepkg3d22sg/52857589819.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/96376277543.pdfIn PDF document text
    • 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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 18164 bytes
SHA-256: fe6a7f992a0f110c6c4502126b159fe45e330ac1e0d4ad7a0c3feb5cde4d2656
font_01_sfnt_off0001174c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174C 10988 bytes
SHA-256: f01149b1b2bc9791095183166d52d56380f07ee8263b57a8d652b5945d396cad
font_02_sfnt_off000130a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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