Malicious PDF — malware analysis report

Static analysis result for SHA-256 6078ce7d5bb94e2a…

MALICIOUS

PDF

107.3 KB Created: 2021-07-23 04:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d7e4bba8a7fe22377f73fffb1db8bb60 SHA-1: 05fd6d031a9564b1d024acb8767863dc1cb6aaad SHA-256: 6078ce7d5bb94e2ada03d8824fe9ab548839b7bcaa72d55ed1ac589f70757a39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lead users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://motelandratecuci.ro/userfiles/file/89346634006.pdf In PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/25356585833.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/44736977858.pdfIn PDF document text
    • http://sun-eko.eu/files/file/melonamonoloduxunuw.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/nagilixusisunoj.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/zadodajawizusabu.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/warin.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c1fdc1ee4ac2cf68a2ddcf4e4b2b021/vitufogotupuforojawofir.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/mopufixetemixevuleri.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/35384995340.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/232901195.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfbd93b0bc---89540621834.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/bb87be306577cd1093e927ee2fd3dea4/20242081394.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/76749138237.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d9dae2555c2---nekujekegazem.pdfIn PDF document text
    • https://puppometalli.eu/file/tafamixen.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12353868b---vegizudawazomefijutunapiv.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f7be2c514---lupadisovojunipukufozexat.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607580271368c---68466375642.pdfIn PDF document text
    • http://salkim.com/userfiles/file/75208619096.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a16ac2acd---levuguje.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/910f837bc8fc568196902f18d7bdeb9a/4530134408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+a+number+adjectivePDF 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_off00013b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15325 10900 bytes
SHA-256: 9a2ef20d50d65106e4478376cadb93f69cdb836635e62be0bd9d9a5914bd354d
font_02_sfnt_off00016c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C2B 20540 bytes
SHA-256: ad7c5af297545b20fcc961949fcb769a5306df05ea75043f5e498334113006d4

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