Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dbe5908bb5c01e…

MALICIOUS

PDF

88.3 KB Created: 2021-09-16 06:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d36efe47460f694775cf2c65df6fd3ef SHA-1: 6c38d02c2d4c2a6b1a876e5944fba8a6f09766e6 SHA-256: 06dbe5908bb5c01e9e98b266b88567299708aa8ce2b7029c1ec1eb68d4080d74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs, including one that appears to be a lure for downloading content, and is identified as a link farm on disposable hosting. The PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://synerhu.ru/uplcv?utm_term=the+family+man+season+1+free+download PDF link annotation
    • http://dtpokebar.com/uploads/files/fosurizoroviv.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/jizipetu.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/wezidebawujabila.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/kikemewekinotunabodibux.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/59771685024.pdfIn PDF document text
    • http://glttek.com/userfiles/file/gitixo.pdfIn PDF document text
    • http://annabarons.lv/files/files/86270963861.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210912054936.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/55208723473.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d2b0d169c---dopemobufizigutudezazeme.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/20889386284.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/bovonevowusekokajet.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/24714234080.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/7880582943.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/rasija.pdfIn PDF document text
    • http://qdjshg.com/files/file/85991506699.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/narikaruzuku.pdfIn PDF document text
    • https://baongochoa.com/upload/file/29942157144.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/66172019400.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/kiwudatikapuvudozas.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/sedovamusuxane.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/kusekijomafulolufituwu.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/10008183621.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/qacbuhckm02gnft4d12n0b8lp4/xaromenulap.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_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 18692 bytes
SHA-256: 22ec4e70bcfaac0feaeaedd6b019efd68c3573cfd9fe448a904ed8b88ae946bb
font_01_sfnt_off000122c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C0 10736 bytes
SHA-256: 220c9bfef78c42475687e2976ef92a7c0e63042eeea8a4ebf3bbf5031f1d0dd9
font_02_sfnt_off00013b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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