Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde05d9197b0be27…

MALICIOUS

PDF

93.3 KB Created: 2021-07-25 13:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cb76dc56fe8d692570e31d497c0db59 SHA-1: d8253be641ca344308cef286482381b6407a5d2f SHA-256: cde05d9197b0be27aa2178e437c0395d797a9c0293323696c14c31e3976b5f7e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, directing users to potentially compromised websites or disposable hosting, and employs social engineering tactics like a fake download button and a lure to install browser extensions or updates. The embedded URLs and link farm structure are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://agentcctv.com/userfiles/file/wadixokulonefewinukaben.pdf
    • http://www.peretprod.ro/content-images/file/15371430331.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/dbhep8qpp1e6en18fltc6krgmj/furojoranitu.pdf
    • http://grandwatergatehotel.com/upfile_hotel/files/24619047558.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096df3b6343f---mejemafemawote.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/zukezigotafonumefujivov.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075f0e672a47---tevegewirasi.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fb7d7c330---2844467278.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b3b8a9959a31375a134aa5b6683b22ea/jinuzota.pdf
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/dosuwubalob.pdf
    • http://etenindex.nl/images/uploads/desetiko.pdf
    • https://psychologgia.pl/Upload/file/59583900665.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202105261602263004.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098505166b08---nolaseliduloloxidu.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096c4e948a67---fonotimeje.pdf
    • http://charivne.info/images/file/48803759844.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160735a78dfa9e---zuritasepixozomabimetoviw.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/1f989ca07f7381f3685f796eae0dc44e/4783651545.pdf
    • http://ankamet.com/userfiles/file/38819618081.pdf
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/12938658291.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/b2ff6df5076be7ab29ca2052d5b85204/38673694597.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832bc4d117f---10383947483.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ec32c9d28---pirezozegulevojaxozudiv.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/uhtt9jorskop5v5jbr3hl4m82j/19080854768.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cinemahd+free+apk+download+for+pc
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef08.bin
e3ebde14339a1f70d479a63dd0b6eee9e692d1140099e5753fbbe7b783b20f9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 10828 bytes
font_01_sfnt_off000107cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CC 16792 bytes
font_02_sfnt_off00011fdd.bin
88a5f3ad9079b2340172ecd64f1cd79ba1ad1753eb2b73e58de10c5a7be67d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 16340 bytes
font_03_sfnt_off000135d0.bin
6322e5663bc30a1336fd59030521a2af1bf234298b29e8034b3ba45d47723a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135D0 18336 bytes

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