Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea9512c615c60f6…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 02:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f6e51c3ce8c0195b9a9b7dc9540f583 SHA-1: a10bee843a99d65ec834eb2886b83fd9fa982564 SHA-256: 9ea9512c615c60f6889a780ae2349fd3a2e6f7196f9441903a961fbea697b73e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://boletos.luzservicos.com/ckfinder/userfiles/files/pixevebaxo.pdf In PDF document text
    • https://listocrm.com/userfiles/files/subuvuwanusegifaxoze.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/10639412250.pdfIn PDF document text
    • http://terminsk.by/pics/files/86101473561.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/81058504974.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/tanewazoguziraziwop.pdfIn PDF document text
    • https://reniuved.it/file/kadavujinimazofifit.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/89330019936.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/lujexuratugebe.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/67991639875.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/86223932387.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/612f8642b95ca.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/5930479759.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/gokibixegatuniz.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210901233819.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/60674512767.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/65168044048.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/rigim.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/rimer.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402d1c2f3c8---dimaladijiku.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/47627830543.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/jixopazizolifo.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/kifexiboduxumujogot.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/darixerukubemebefufamego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=rare+symbols+copy+and+pastePDF 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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 25836 bytes
SHA-256: 41f1a3476c4f35d38b44a68b7ab51f1ddc28db41f49819e19d49f95da52c9738
font_01_sfnt_off00010bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD3 10880 bytes
SHA-256: 1e4d40c5f038c6cd6e75e523228cf1699dda94ae3b1b5d6cd3753297b9d5b89f
font_02_sfnt_off000124d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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