Malicious PDF — malware analysis report

Static analysis result for SHA-256 d008749ed38d7705…

MALICIOUS

PDF

91.8 KB Created: 2021-06-27 06:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c53fd44ed22d62f497c22605aa7332d1 SHA-1: bdc5f412bb9b13fa6799de2ad499e48af122b289 SHA-256: d008749ed38d770523059431db501476cc0fbc303710fafd031d6ac7b3470fbb
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful or phishing-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082a7a6ba5c5---disopuwojukefepapenin.pdf
    • https://mvpartners.be/images/uploadedimages/file/8375837412.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607807f93dab0---zovezeneziruwisukuvuwaduv.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3fb2c4cbf519b6dd1ef3eb6a2a6177af/kerixosobijuran.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/el8hs59h8idb3vin54k55se6ut/40777260090.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/i9g3jftsr1k8bphsafbu5sjcv3/pilulixejo.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/088bb88310ed06cda31e5a3e994fc41d/pusoxurezev.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c76d947fe14---61356937316.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/1nbsfcd1c74s5ef0i2h4lquqd6/kijotewelebutegafigo.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c5f216f38---59969816451.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a83dc3e2512---97252738546.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/46epkui97uq01832d4or18qtu0/43423618079.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c89137ad9---99722343710.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/fb183c1ea1acafda04721eaac1102944/bisilujujakeguzevam.pdf
    • https://martensmgt.com/business_school/uploads/file/nirefinezigegikijaziko.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e5c894c23---nekurimibew.pdf
    • https://suma.ca/upload/editor/file/34395978491.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79f17345c9---likozesirozeko.pdf
    • http://humanitool.ru/userfiles/file/tijujikelusip.pdf
    • http://residenzaeden-albisola.com/userfiles/files/66324722251.pdf
    • http://sadiqandsons.com/userfiles/files/dokuburem.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e3eb0f8d7---bigukuxapupofiv.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/besumijapefivapu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=birthday+prayer+message+to+a+sister
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/4c606a4f9250226703fe9bb779e6a15c/telazud.pdf
    • 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_off000106ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 16792 bytes
font_01_sfnt_off00011ee5.bin
635ddde3e31c3236bd9cb83fb34178940374f31d25691d02df17197740762493
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 10856 bytes
font_02_sfnt_off000137d4.bin
077a57f1631460d97c7c335a1e2957887da1526d2dc09861d1c16379a1718f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x137D4 16452 bytes