Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60f24c037251a49…

MALICIOUS

PDF

72.0 KB Created: 2021-06-24 20:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5fa4e8d9901468316091e73ff5a2139d SHA-1: 1bd3bbcc5d377b596f5431346fcde0e54e9c68d7 SHA-256: c60f24c037251a49b5f85d9e2c1c98ade4d83a924f7b4157613089e9bf10d17e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to external websites, some of which are hosted on compromised CMS uploads. The presence of embedded URLs and the overall structure suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=free+printable+blank+guitar+tab+sheets PDF link annotation
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/uqn6st878epp3qc291l7gl4iun/xapifalulo.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/70048402571.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/fezebupifefuvijagod.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/0e79caee8f1c102b6c312a7b4250b191/dixixevidip.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b65212ae591e218a1d6ae18ff378ab4/fizajizomitux.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e71ea85bd---24674220680.pdfIn PDF document text
    • http://amdind.com/userfiles/file/25726950679.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920d7296036---89969883906.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ace7e2ab2df---gusovomonex.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7d0a9632588d567720f407da7154e434/lurazojituvele.pdfIn PDF document text
    • http://vaikevai.com/ckfinder/userfiles/files/mobet.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/kivoza.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/4fd31c297824e0057d3d9d068d210e37/latejilawoxuw.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/348e814b17716dcb2b8a37ef45bb1a57/xuwowarirobejamikatadema.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/fawejafogapapaf.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/dac265781a8cf5cfd04008ddc1d7981c/tewudiwopowifotoxu.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/768e733ed2a13580987b2201e59dc7d9/48997334027.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c00683e7---30119770621.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 5240 bytes
SHA-256: 5a7106b97709ca13aa5873732a27e8c1a3d3e99fa70278975079bd3230029ea5
font_01_sfnt_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 11420 bytes
SHA-256: d024d215079ed65b81cfc177f58a9dd8a7d16027301c2fbbcf50ab478e6b0ced