Malicious PDF — malware analysis report

Static analysis result for SHA-256 b033e75647175a5f…

MALICIOUS

PDF

88.6 KB Created: 2021-09-12 14:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b9cce0127136b0e36baa800e03249309 SHA-1: b1bef0206aee8c471fd1320a4b6b99f7cf89345b SHA-256: b033e75647175a5fd3f6cf71115baf3cb208e1f987a0f591eee0215c4e9df7f0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of urgency lures further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=android+message+tone+free+download PDF link annotation
    • https://villadelauca.com/userfiles/file/fojokutozodolulirorinobeg.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/puginujudar.pdfIn PDF document text
    • http://hangquangauto.com/files/58842913158.pdfIn PDF document text
    • https://advik.net/userfiles/file/xefapuzezu.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/95038447728.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/74724351315.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/gaxulozemelirujurawosovo.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/34702171127.pdfIn PDF document text
    • http://bluebossa.pl/files/file/fezosizedexunete.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/91293368111.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/zezifomumawiluvasip.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/zupupowiwanuvutokadozedol.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7831b78f3---bosinite.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/4928807337.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/metusigalop.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/vovom.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/23587583026.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nurojoxisuvoremupilira.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/59895463029.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87535396068.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/81719898896.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/wutuvikalogufegiwugiw.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/tke2qf8mnmkijntnojvb2dhvii/53370861369.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_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 10764 bytes
SHA-256: fec215a7b66b10cc1d56a4e63d8cb36382f4e6cb5df8e10b4a5c4d89e9bd4452
font_01_sfnt_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12572 18312 bytes
SHA-256: 0bc46c334397a740de227768178755c2885b62a116fc71294fbbe14bb158590e