Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1dbe7b71862dda…

MALICIOUS

PDF

73.0 KB Created: 2021-09-17 13:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c2ebe4d2f8df7fbd69fd1caf64d00751 SHA-1: 0d783b267d3db32fdef015490a70757c0c4c69bb SHA-256: ee1dbe7b71862dda2a59b76b72989c0aa0e4482a55a0ab3f431436e621b6342c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=watch+john+tucker+must+die+123movies PDF link annotation
    • http://qdxqw.com/uploadfile/file/lelojiguzudom.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/92390915547.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/11375951067.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/vilaganufajumuperafafi.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/97138386189.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/fodabegodofotosapivun.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/nijogizujudejigo.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/mepoxodixitat.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/tolugonugugigabusu.pdfIn PDF document text
    • http://jiab.net/userData/board/file/tofululituw.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/jarejilamusuniwaro.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613eae2dacc57---tetapudoge.pdfIn PDF document text
    • http://uchid.com/uploads/file/penigibekafuxow.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/terisevimilovitolapogevof.pdfIn PDF document text
    • http://susutour.com/userfile/file/jupimilobuvoragewavunirod.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/69945757699.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/92400910970.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/kefekutegerijixesolo.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/35326756313.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/46069771365.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/bolupofivir.pdfIn PDF document text
    • https://senfina.top/uploads/files/46750427241.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/xazotabaz.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///52583572549.pdfIn 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://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_off0000bac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC3 11316 bytes
SHA-256: 8174fe3bf27c676ae53033495e9527749216429a5ad4374d47bb6c8838f50856
font_01_sfnt_off0000d55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 15808 bytes
SHA-256: 7e5f3f23204b2fd6b826d6411e2578104741cf4a024b37e029c55fcb9eab05ca

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