Malicious PDF — malware analysis report

Static analysis result for SHA-256 92702ee595822789…

MALICIOUS

PDF

86.0 KB Created: 2021-09-08 19:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e6253843c7c9f19e81ae88dd8c4d255c SHA-1: 0f4a5627f98d2426fd4ef8735a911e32468d7be8 SHA-256: 92702ee595822789285ff69a52eb5ed02b527808b630c8428bbf4e562be36b9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or link farm distribution strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://coretry.ru/uplcv?utm_term=fssai+question+paper+pdf PDF link annotation
    • http://benetalent.com/upload/files/70695758586.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/03aec55d88d77db18c18651dadda2e01/70942081570.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/19a0d5b6a631c78b104fecff7b98a880/32374024603.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309f49070dd---47037548410.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/fijakasisapolesodilazuv.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/h7a96tep3utoajqeq4feep3b3c/bapamojofowave.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/58865505065.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1630528370.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/45752463047.pdfIn PDF document text
    • http://thevalleytrader.com/files/laponojaxa.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/55644555590.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/powalelaw.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_6D2AB40452C0C21D.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/vomeputofamukawogigaza.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/62362610095.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/11712818426.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/sapagupuwaluli.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/71147949867.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347615887e8---gekasokazefemefim.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/winujipafup.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/mivaxarawawa.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/36685166208.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/kuwugusilu.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/warerevisiluzix.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/64108468325.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f1a7da73---ziwalexexanelajaxil.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_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001023c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023C 18260 bytes
SHA-256: d18445587154709f6d6b5466a7fbc5e1aa8eb6c3352feb623a6102d922e53b3b
font_02_sfnt_off000131c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C7 10668 bytes
SHA-256: 71907bfb981b6dd193a6452320aac48b34130a84777917e8485b2943ffd8c7be