Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e463dc88b2b7f22…

MALICIOUS

PDF

80.7 KB Created: 2021-09-23 04:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c06687f7ba63c143e49deb6035d3f189 SHA-1: aa2c4d38820c506d95a75e0b35a2e0b33c69a800 SHA-256: 9e463dc88b2b7f2286bca849c9219540a4a58bf2bf7d19782728a1597acf1644
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a link farm heuristic further supports this assessment. Although no scripts were explicitly extracted, the nature of PDF exploitation often involves embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 4

  • 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://irlanc.ru/uplcv?utm_term=hacked+amazon+prime+video+apk PDF link annotation
    • http://hp-cnc.de/uploads/files/pufesamazikonux.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/wovatuz.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/nenosujojumutaledo.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/7000287805.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/75224700126.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210911_3A37E16D09EBEAE3.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/29083973029.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/rokexaxorebidagofot.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210909145220.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/dodavafedupuburuxupusixab.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/38921419901.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/23607398281.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/bebozipejenegiteromu.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/kalagenugosivukagupuki.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/75170075495.pdfIn PDF document text
    • https://jagominum.com/contents/files/xufuken.pdfIn PDF document text
    • http://tencanpowder.com/d/files/88221102342.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/begedesebosigem.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/54797808034.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/domuroxumoveganuvifolevus.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/sefifoluniz.pdfIn PDF document text
    • https://grouptm2.com/contents/files/tatixagedagelerepoxa.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161400713b0d5d---nusabesal.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/gevane.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/refajosozujadapak.pdfIn PDF document text
    • https://stvorki.ru/files/file/87339291811.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_off0000d4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EE 18148 bytes
SHA-256: b346f7ec229183081b63e4e98e2c3339166392100d7350fde999be33d5366740
font_01_sfnt_off00010470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C87 10572 bytes
SHA-256: 7ea0a9ba932057798334a7c7ede14ba9ba0f3694411417dbc1097ed983b64aaa