Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ab1698e0f4bc9…

MALICIOUS

PDF

90.9 KB Created: 2021-10-09 14:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3072f2d440c0d844e57ec33a6797d9f5 SHA-1: 2f09b067a80a65535d7295b2978962add35cb9de SHA-256: db0ab1698e0f4bc9bfaddbb88e9d5f1fe7da5aaa6c7866cd093633b6e3720787
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs pointing to potentially malicious or phishing sites, suggesting it's used as a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the PDF is designed to redirect users to various external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://medvor.ru/uplcv?utm_term=joe+sugg+strictly+come+dancing PDF link annotation
    • https://mosallaesf.ir/uploads/ck/files/goloxejilidadinipe.pdfIn PDF document text
    • http://yjccnc.com/upload/files/tokukomamod.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/wupozebudofimekapigifi.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/lupiladituxaginexeruler.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/xoxesu.pdfIn PDF document text
    • http://wernitznigg.at/files/kefiripafubivib.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/68741693518.pdfIn PDF document text
    • http://falconltd.pl/cache/file/51661861743.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/zodufaludibifowobedu.pdfIn PDF document text
    • http://citlak.de/admin/UserFiles/file/lulogulavanete.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/81192421660.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/36651284061.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/90702209114.pdfIn PDF document text
    • http://presupuestos.pavysan-bigmat.es/ckfinder/userfiles/files/nobile.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/nezusaxu.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e1c31d76009556503e8d8a932a1c09b6/80341168196.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/fonivigosakam.pdfIn PDF document text
    • https://kawanmto.info/contents/files/kiwulirutijudujuturu.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/gokijixesufunavanigeku.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_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 10920 bytes
SHA-256: 2cd7260fe765931f6cd5daf22006b130438b499d5af370feee14b4336bf6f8b0
font_02_sfnt_off00012806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 20756 bytes
SHA-256: c034fc908d523c199b74309208b30caf878884cd76b2364aaa893ef43d2ae4c7

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