Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0ce9148fca40a3…

MALICIOUS

PDF

81.7 KB Created: 2021-09-22 10:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fb2ee65d31583ce0c986baad161393b3 SHA-1: 40e00aaee40ba8d27ee03fb63a67a465238021ab SHA-256: fa0ce9148fca40a3f091c77da96b4e7c2a58ecade3c70208f9c0705cd8ee79c0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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=royal+slots+apk PDF link annotation
    • https://hophamthaibinh.com/upload/files/nafaxuvifiluzoga.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/bodivokovonedivupudafuw.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/80962474856.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/gukux.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/603c6a5a81f58a55be7d6b90c4cbdb49/darobi.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/podusugefofixomatopufi.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/sedimajufi.pdfIn PDF document text
    • https://tenfci.net/userfiles/file/bopiposojubedasemumipodo.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/62857283451.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/sarumoninudafobefav.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/6115273248.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/88724976106.pdfIn PDF document text
    • https://alwaysthesame.pt/site/upload/file/41256830104.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/19043847946.pdfIn PDF document text
    • https://ccskin.com/geektic/files/gozagun.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/gubatonemudat.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/rexusorixiwaz.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/25925005853.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/muwedopimapakepog.pdfIn PDF document text
    • https://websbag.com/uploads/files/lofawegetame.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161492126c4120---nibejuvofunoxajuposazufez.pdfIn PDF document text
    • https://olterus.com/contents/files/desaxageguxizozofupuwun.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/sobifovigujibagefobulik.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/96310037869.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 18300 bytes
SHA-256: 330c4685d733c9e3a1e931d6ae64604e2daf57c9bb3390c3b769365dd3eaaf8d
font_02_sfnt_off000122fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FD 10068 bytes
SHA-256: 1077ae485d50ddb386f3c802666384d5cae6a473f6f4d3c54962e8f9a9bf6d7f