Malicious PDF — malware analysis report

Static analysis result for SHA-256 4555fccbf0f046af…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 02:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 22b61c31e44da5517a2e2299a6ebf9be SHA-1: ec79dd6130dedb0fdfe9508120177d0ca780b41f SHA-256: 4555fccbf0f046af534b2efbc188b91eff871efbe0201e4e74bbd6ff42e112ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, including one that attempts to lure users into downloading a game, suggesting a social engineering tactic. The PDF structure and embedded links point towards a phishing campaign designed to trick users into visiting malicious sites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/uplcv?utm_term=god+of+war+for+mobile+download PDF link annotation
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422bcc4d845---wenufanetarotodamuf.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/fomimotukufefokerubigepi.pdfIn PDF document text
    • http://headrepublic.pl/images/files/niziwedinuganogijog.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/fegabemetefodabetejuk.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/kugezoxex.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/43300686379.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/3558596463.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161316c920bdf4---nikofisibavoxuredazorej.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/35649568299.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/nubiwajef.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/67708741303.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/guzafuvutobubidofonorij.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/nefagom.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/midonumuruwezilolob.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/23393092746.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/fexexoberimukoges.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/wodurutekezadabez.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/88003429709.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/ropugapunugaturanofari.pdfIn PDF document text
    • http://xycrusher.com/d/files/59960951969.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_off0000deb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 16236 bytes
SHA-256: acbf534378ed6277d399a5b3f1c4f0090b40cc9a310791c1a20714580810e659
font_01_sfnt_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 10512 bytes
SHA-256: 53ce975f39a01eb6f1ad9bcca8b58540d1457b4cda81cff4929ccd08e6685a5c
font_02_sfnt_off000120c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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