Malicious PDF — malware analysis report

Static analysis result for SHA-256 485296a24a5f2326…

MALICIOUS

PDF

82.5 KB Created: 2021-07-21 02:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9b0e0426355100bda2e4205761793fc4 SHA-1: bd5855abc6b89c5067204cb301d4c4a55c9011e8 SHA-256: 485296a24a5f232638ed628833a39c3606fb50ccbe2d04a3588ceb49e332f5c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to potentially malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The presence of embedded URLs, including one pointing to 'lucidareemantenerepavimentifaidate.it', suggests the document's primary purpose is to redirect users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/03740a5ecd2113eb0f217cb8716cb748/91129555304.pdf In PDF document text
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/56013518215.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/sinekoxisebi.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3505bdf3---7049923251.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098630a0a235---82385327709.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2abb5b22a6ecd5ab1e5b89a2b55caf7d/sekedabusu.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/30266678521.pdfIn PDF document text
    • https://topupdana.com/contents//files/lalelorinifalozo.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073856b3bea9---11615604168.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/zesigavewupitexanafabevut.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/41183764779.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/81756990952.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/fosipap.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ad5d3727---9045483102.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/67745765447.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7f131f54a---78556660639.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/nerokubis.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/e81852ddb1baa50cbd68c07bdb7727e3/nolusaj.pdfIn PDF document text
    • http://bakoca.hu/files/file/dusaf.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085623f208c8---58648201798.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb280081122---24925848702.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/18604738870.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/4747410102.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608117ac1f8ce---60038212989.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=english+to+translate+indonesiaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 17684 bytes
SHA-256: 8f83b5fd32e667b41f8346cbe4af62355c5b849d5b28c61c9c26fd9cf4e4c8b7
font_01_sfnt_off0001246d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1