Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cad0e528396da8…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 11:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d449d65f4aa185794c810c4df131d749 SHA-1: 5460963e76cf98542937388495ef110d9af7c24d SHA-256: 01cad0e528396da88a592486a097ad9eb10066f59cb5ad7a5129f82b97a9321f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to distribute malicious content or phish for credentials. The presence of external URIs and the link farm heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=fortnite+v+bucks+generator+switch PDF link annotation
    • http://pantryscan.com/123cars/imagefck/file/8943165910.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/37030095720.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/gajisilatoketipav.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/sigapuvuxo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8c2d3d402---39184771467.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/dobexazox.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///85847322878.pdfIn PDF document text
    • http://hangquangauto.com/files/pimativefosavov.pdfIn PDF document text
    • http://gptools.net/userfiles/file/puvepi.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/memofovasubes.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/47977781475.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/risexekemegomimoxupiluza.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109030001372693.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/virikegukafupumimofe.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/budugotobuwerufobomigeb.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/38113980444.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/29909435102.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/kowopo.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/433503315613ae33a54cbb.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/48131593808.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/gabakaxigatob.pdfIn PDF document text
    • http://guowangcable.com/d/files/32377411514.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/gifevutavuwefijafawojilo.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/zafalu.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_off0000d506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 10924 bytes
SHA-256: 326532ebdd4519a377bca3b1040a8dd0f1fc1a7a939350f8bf895ccba42eabd8
font_02_sfnt_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 17376 bytes
SHA-256: f8318ce29e781bf2a28224d92c3506cc2423f8b3b3d26d3856a7db98aee2eb5c

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