Malicious PDF — malware analysis report

Static analysis result for SHA-256 30270d055b4bd084…

MALICIOUS

PDF

90.0 KB Created: 2021-09-17 11:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c232f0fffde2f2bb8a78debf94c63a23 SHA-1: cb86d4bc85a50e43e84df5ae116ebac2de7d2bc5 SHA-256: 30270d055b4bd084649346ee261d1b64169153ca471e52a499a60e9cf96dd962
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a link farm designed to obscure the true destination, likely a phishing page or a malware download server. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://badischer-kunstverein.de/ckfinder/userfiles/files/37831169495.pdf In PDF document text
    • http://handgun.ee/media/file/22297673505.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/gerabuvijavupe.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/27458011749.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/74937125548.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/rezivozukupudewatap.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/47884855297.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/zajedagojaxaneb.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/juriru.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/19422214705.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/6e5996668a2b602b6deb367edf566cb9/rokomevuxogilin.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/5990184090.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/86095863976.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/38205828925.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/fubemefajopejowa.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/naxunovedeve.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/tukejifovisuwezaz.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/razezub.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/58734840712.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/farokoxe.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/47864010111.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/19379195819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=como+hacer+pistas+de+musica+en+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BA 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_01_sfnt_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 19396 bytes
SHA-256: ffff6f07462c2b54814007f14d1732d4ba9f5244e8972f9ce718954a55cc678d
font_02_sfnt_off0001295a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14171 10864 bytes
SHA-256: 0b3695320ce3e968321792f9d6ce143ca6ab430551ab96ef37a3acf053ca00ff

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