Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d8d0a00ac5e07e…

MALICIOUS

PDF

86.8 KB Created: 2021-08-20 02:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 90442b87d61e79d294885b10f734be85 SHA-1: 0df426384969466368ef89310ff9fe5178aaf4fc SHA-256: e6d8d0a00ac5e07efd18b7dd29c519d11bf2fea73072ad31e49dca2d38926ff6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external sites, many of which appear to be compromised WordPress uploads, suggesting a phishing or malware distribution campaign. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, a common tactic for executing malicious commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=office+2016+32+bit+download+offline+installer PDF link annotation
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/d761aag7hbpmtkbo6bj8mejvli/31769805966.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/28423799948.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ac0d7f0127d04a2c12fd91b2833aa7bf/tuxodevupawerew.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/dko4jh62d69cgi4tdqcvpb8upn/99064831049.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/t95lt9nfnnepjt6ssteq0f915j/43294584522.pdfIn PDF document text
    • http://novena99.com/uploads/files/202108191701238128.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/055309c6273cd7e0bee00cfce5dd8381/mawejosexujimisemusota.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/350d4cec211e8ec6a1c1bd6b4581c6dd/tenasolozuwamok.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/26773290739.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/77821519047.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/fesovujebimu.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/b670572138f7855f6bf6894afd7c6dda/vavexepugaluboli.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097467b5bbb4---lasofupewas.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/38825066107.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/82406169893.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/mizazenikuwogetowupuge.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210529_010842.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/43816437254.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/nuxuziwirijunagoz.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/uhas4pune3ib6pbsnmnfiifr15/62144153773.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/0044a3f734d15aea9954462cb4172d21/gudibuvobezenalile.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/zodizexisudi.pdfIn PDF document text
    • https://spacio.hk/attachment/file/86364293811.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/ravajidagizajig.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/wajezupu.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/bodipiguriginib.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_off0000eccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E3 11356 bytes
SHA-256: 976b96919c9908755ad85375e312727946f1e034c7bda591312ce573b8325551
font_02_sfnt_off00011fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEC 17356 bytes
SHA-256: a5adbc54de786849fe35dbefc77a2a8b5a6eca2e57b34d3c1072ededa7d7cba0

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