Malicious PDF — malware analysis report

Static analysis result for SHA-256 134ae9a43baf5ead…

MALICIOUS

PDF

65.1 KB Created: 2021-06-22 10:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d7cab8ce969529c0c03757c7b1f6d65f SHA-1: c3b39672334b13fcde761f22c4d1deb82313e662 SHA-256: 134ae9a43baf5ead89ca4a4ce1e307dc3b14fbfb4a6f96e5ab683f5fe86e25d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV heuristics strongly indicate this PDF is malicious, specifically identified as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS uploads, which are likely intended to lead users to phishing pages or download further malware. The presence of a link farm on disposable hosting further supports a malicious intent to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 5

  • 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
  • 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://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ed87c8a1975c5abda7145485acf6c216/kutuzejereraxuvunoze.pdf In PDF document text
    • http://4grd.com/cmsimages/file/79228822862.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a4a2ab95a8690491cb815f8f44af8140/bomakivebo.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/t2uh11ls7u9mlabholrj8a6g9n/kozenakajezafoxedobufexim.pdfIn PDF document text
    • http://goldmustang.com/files/files/gatupatexopawi.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/badartoda90tn2che9gt4i5c03/lenakuwizabebidajiwekuwe.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/897758733fe0456d685ef6d867b306de/roxuden.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/qnl5i49b1rl0qmgkn3pkoldcfu/vaxotix.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090cbe54d8d3---52941244480.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160703fbd08749---56526507935.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/67339467591.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/04fa1e75a3cb3e1e0020b141971854b7/46365266750.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/155e79ea150a30ebcbc5295f07ceca1d/55820785084.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bbb938511---29142229208.pdfIn PDF document text
    • https://incasur.org/temp//files/83810211386.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/4ff29572f172019e04f1c4390b623e48/28383722984.pdfIn PDF document text
    • http://sport-way.ru/img/file/15092881989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=taki+taki+rumba+mp3+download+mr+jattPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 5412 bytes
SHA-256: e607f386c32edcc06204db74238198560f1511f091e9b5696e1b0e69167ba2bd
font_01_sfnt_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 11188 bytes
SHA-256: 699ead1c66dd352fd4404d1216ec823e17b5f35ccdeb8374f8a97dec54d26d70

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