Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11e14fafa8629b6…

MALICIOUS

PDF

84.1 KB Created: 2021-09-10 18:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 74d41916f7cf513ded060309152aa916 SHA-1: c2d66ac8eb6e706f7cc2933cc55e0a8cff80f18e SHA-256: d11e14fafa8629b641c9e1a6d0cb01568eeadf611efe699722ab71bd34cef4ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous distinct URLs, many pointing to PDF files, suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/bifosima.pdf In PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/wenix.pdfIn PDF document text
    • http://wirheiraten.de/images/file/rufisujevirodu.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/wubirogofudi.pdfIn PDF document text
    • http://canadanur.com/resimler/files/bozosimofilajij.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/tefitilunijolukavipiwonap.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/garinatin.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/61244150941.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210908065355.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613adf69e1932---lisunowed.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/27382461576.pdfIn PDF document text
    • https://zzwgjx.com/d/files/tonidimavinoxedi.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/notopaluwomulogu.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/40147190984.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/viguwulakuloxafokif.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/nogepedak.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210908135013.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/xobim.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a70e1c2616---5100743647.pdfIn PDF document text
    • http://sayarbobinaj.com/file/ditavivuwezifujap.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/wikoxatixajejiketudiz.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/gimupasuxaresejovunotum.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/65924340707.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/10515635230.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/59706821339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=wwe+2k+2020+download+for+androidPDF link annotation
    • 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_off0000e3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 10496 bytes
SHA-256: cb62907e1d5db6e1298e5cd47878c044f8ab1db6f7015677e737035cdc9ab96c
font_01_sfnt_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 17892 bytes
SHA-256: c4ea6151c33f8366668f5887107e26ef5764797ebd02bfc4b2dc85f53f7ceeb9
font_02_sfnt_off00012a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1