Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f17c130766fd800…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 17:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6986467f2678b6d3795a6098660ca5e SHA-1: 3abd4691d96b84808dc8bc9f1508f7aa7a2291af SHA-256: 0f17c130766fd8004cf2a49eaeecc5d00cf4ba493353101307edda1028643e42
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://tecnicadovolante.com/images/file/3280034361.pdf
    • http://thanuyentea.com/ckfinder/userfiles/files/mojofukarafan.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/suwumoleninajodu.pdf
    • https://studyhalltracker.com/files/file/18047796594.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/07c47d24eedc4888f98907e91a145409/89870303166.pdf
    • https://ribaczpeter.hu/files/file/gosodaladixefaz.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1917458d47---mixosaragujowozapiger.pdf
    • http://xedaphcm.com/luutru/files/79346558869.pdf
    • http://jn-zhsc.com/upload/88779559623.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611a2aa387b47---nuluf.pdf
    • http://vce34.ru/attachments/file/pebuwirukopeje.pdf
    • http://flex-link.cn/uploadfiles/files/kebumafuzaguzonotujife.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091d006cd648---jikivujunukubif.pdf
    • http://nissanotogovap.com/uploads/images/files/43029941882.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/fccb5bbd9b176635c821572a531758f7/56536337600.pdf
    • http://whs1979.net/clients/65916/File/87916368463.pdf
    • https://izyskately.ru/foto/ck/files/xamup.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/lh3fjkb04equdro9s2hg1c9dqo/66150709429.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f27905a888b17089cc0611b019df0909/30340948423.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611feba334c88---23305341267.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/2844ca5f6c17d044c6db2f739b80425a/96635978067.pdf
    • http://www.pattyn360.com/upload/forum/files/4487327718.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/6bl2reog6fcik7u498b83e8l26/17201958514.pdf
    • http://gusanhightec.com/userData/board/file/boriwopalusowugej.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=angle+and+its+measurement+class+11+exercise+1.1
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 16792 bytes
font_01_sfnt_off000106e7.bin
f0b896ac678904e7bc32dae3bf4c3523925305f05e2d75e0a1239f74610bd1e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 10892 bytes
font_02_sfnt_off00011ff6.bin
77050737d995ad3c63b3ffa68b6cc98d0ecdab59de4d57f0fea411467ee3b314
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF6 17600 bytes