Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce602615f1a3201…

MALICIOUS

PDF

73.1 KB Created: 2021-09-17 10:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b5ed95fef274f94c4fd80fb703919e71 SHA-1: dbe50305b2be338dd974a945d1486802e36753c4 SHA-256: fce602615f1a3201ef368662051e386e0808b9b077fd27f4263e5a56def747a2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The PDF also contains numerous external URIs, including one pointing to 'oniceh.ru', suggesting an attempt to lead the user to a malicious site. The presence of embedded JavaScript and external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=pokemon+light+platinum+cheat+codes+legendary+pokemon PDF link annotation
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417ad4c5813---fisobeviwusosabigewuw.pdfIn PDF document text
    • http://trubaopt.ru/content/file/81775869158.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/muwemedikokazezaloxupe.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/94138746512.pdfIn PDF document text
    • https://equalland.com/uploads/File/potikis.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/nafutolefukaxadusiw.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/vuwipubivuzavasokoje.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/49404705390.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/79886429499.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/kuzigowiwugenosomijalaj.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/kamibasopaxawolafaga.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/sutetinonudalimifa.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/raradejazaraj.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/noladibapej.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/buzede.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/21653909500.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/51907001114.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/c6881c8050874f564d75c0048b04c761/fitudobakixikugez.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/donogoz.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96639640366.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/fixivipalufajut.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/wakaw.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/sipegisepuk.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/84433246105.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/3079795892.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_off0000b9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B3 16472 bytes
SHA-256: 7c5363ba349b7ec77b5646ee505c6293fd9cebf25da963112c667c9a12041dec
font_01_sfnt_off0000e42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42B 11268 bytes
SHA-256: 8690ea06105fc04325723656881c2c8972fac4e6d7a318af6d7373c8847994a2
font_02_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1