Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3122295d8af3ee5…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 00:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96c933648b6e9b54192e5cb28d952474 SHA-1: 2506a222afe71ca4891f348d992e667da80183c4 SHA-256: d3122295d8af3ee5622b4ba5dfa5bb9c0518f826f05752aef0d7a28c4f85ce95
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised websites, including those hosted on WordPress upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF link farm heuristics indicates a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://afritransport.com/app/webroot/files/file/lunije.pdf In PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fee5b774c3---febakako.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/tuxoxadiga.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/totowaxikevavilex.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/vedalekazexoxe.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/jepajibedamedop.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613067e54240e---voluramifezowewaporig.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/63284695332.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8375d6348a3eafb1ae4998c57d224ff8/72150147067.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-3/20210903124450522631.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/35443192675.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/55516907136.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61916566322.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/98890673516.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/1631480475491580490.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/17524286658.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130f2d60d889---fumupizajuzesuguwuzuvexuk.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/92652252066.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090110031581945.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/99388136602.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161323f57c6b8c---67868592556.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136587c11e22---woxubifo.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/rovirus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fnaf+free+roam+ue4PDF 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_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 10128 bytes
SHA-256: d865493b8397d5fb2d4b6172da3b1ca658386512d6a56884a0b6d342d0d61951
font_01_sfnt_off0000ec59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 18988 bytes
SHA-256: 05ff2eac18d1973fda1c099540bcab1e743a7ea65dc7060933116356c95f156b
font_02_sfnt_off00011e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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