Malicious PDF — malware analysis report

Static analysis result for SHA-256 2998dee1bf3aba92…

MALICIOUS

PDF

82.3 KB Created: 2021-08-01 00:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: dd294bae152d0deb1c8028a61dd360f3 SHA-1: d943421fd79003391a542166b8b8e9a26e1d06ad SHA-256: 2998dee1bf3aba928925116c4211a3529a16220a4e85091b56cc4c49635079e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress uploads or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure itself is also indicative of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://cructi.ru/uplcv?utm_term=current+issues+and+enduring+questions+pdf+download PDF link annotation
    • https://edu-mate.kr/_UploadFile/Images/file/61592133552.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/safazoresil.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/gefebiwaxivegaza.pdfIn PDF document text
    • https://nada70.org/userfiles/file/bakowitiwudo.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c218aa0b696---30935429662.pdfIn PDF document text
    • http://ks-puyuma.com/CKEdit/upload/files/29294507048.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/83426514637.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/dekatajun.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a0dca1616---38565661716.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/92338413361.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/22387830391.pdfIn PDF document text
    • http://z500.si/files/27929162867.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/14847590520.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/ipe2l50u1j0v5l5da01lh48vii/gisafijako.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/13hrki6miphab8l71n72ji3co6/wemufozonedip.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/toxafuwenoz.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/vutomo.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/tazipafitum.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/figigakamovukixu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2ebffc48544f21f5bca6db28acb05bf7/gebebu.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/lexodajigixafanoj.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/3t5v09615ngibme6te3pmq5ef7/65607529566.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/85897546163.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608307d2eb687---71338178162.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/sjmlrp7ecdipacg451v6t158f8/9283731633.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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 17172 bytes
SHA-256: 8cd4b77890cedd63f28217aa9cf3d5589bd4f709b85184b9de9a80670bffd1b6
font_01_sfnt_off0001091b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091B 11036 bytes
SHA-256: f14fa9246a9d217be0e2160d652ba1c2f288cae1eb2574fffc0b4945998ce173
font_02_sfnt_off00012274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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