Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e98a739b2bc6b7…

MALICIOUS

PDF

80.6 KB Created: 2021-09-14 15:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 96f49bd1e6ad3b454f2ee6494c71335d SHA-1: bffbe4f7006e74ab1448c5ad5b579401801648d8 SHA-256: 03e98a739b2bc6b73d08b32acdf0b8020ca57aa1532e5fc4a89a56ce31ac9099
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links, many pointing to unknown domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a strong intent to direct users to external, likely malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://vertracapital.com/uploads/files/8011793541.pdf In PDF document text
    • https://adikketiga.com/contents/files/76217041750.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/tixajan.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/63418377442.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/wukene.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/22947421326.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/bezuvanon.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/muxusavalamemiwe.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/50365752342.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/25659817786.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/88249738437.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/42697405206.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71466682357.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/6970551791.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/93033970179.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/52340607938.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d29755fa82---36262033032.pdfIn PDF document text
    • http://atomleasing.ru/media/File/zumotowi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dbb366db7ab7dc523955d105f68f6a8e/rivexesamazewejat.pdfIn PDF document text
    • http://euroambulans.pl/userfiles/file/ponekefukabuv.pdfIn PDF document text
    • https://rajaunited.com/contents/files/pokuvip.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/zexojipifunalaneril.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=talking+tom+camp+hack+apk+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 10700 bytes
SHA-256: 9f7159663567983a7917fbeeeb09c760bde42a6ba3948fab4fe05c23efeb5d1d
font_02_sfnt_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 17460 bytes
SHA-256: bd1fafb28e5879b25c268fd3a27cefd42f1a3a45042134eb546db68c9ba2d0b8

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