Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12b32d180ce7ecc…

MALICIOUS

PDF

128.7 KB Created: 2021-07-05 22:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc97b21497c5d834085c1437a8269dcd SHA-1: ae92716e76b35ad47a15be1bfe812141f3dfc778 SHA-256: f12b32d180ce7ecc83bf56f34e4586729bf812984255f72fa61e3c7defdef34a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and link farms, suggesting it's used to redirect users to malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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 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://infrive.ru/uplcv?utm_term=project+on+soil+erosion+pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495a2bcec0---gamefuf.pdf
    • https://maconlux.ovh/userfiles/files/xonovaduzolexak.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf828c3ecd---1402904227.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f91181a8d019ffc746c10c0d154fd96d/46978672407.pdf
    • http://yachtandgulet.com/userfiles/file/rofij.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed753d7781---14731165640.pdf
    • https://asset-books.com/userfiles/file/90861524625.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb6ec453b4---20737237291.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9ac56c36f---50728643456.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ac1daf9a10ef61c9a8b1eed5d95c79f0/25690116109.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f1000bca2---wufatepiparawepudegedirox.pdf
    • https://aquarell.ro/userfiles/file/sarejewefod.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd74bc87fe---gaxanukaf.pdf
    • http://residencecarlofelice.com/userfiles/files/55481664677.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fe1993686---wopefar.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf5caf75a---sedosijoxopomevu.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3213bf33b5---34999873250.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/56e24648557494a91c206e24eb722123/jatonelow.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b05331f80d147a769035c25e6672ff70/19172846553.pdf
    • http://montaze.org/democms/userfiles/file/lovemivekav.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/r98ngms7i0i8mpir9dlsf2rc0n/56622869672.pdf
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55511833274.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/349cb6e675e5705d05a3660347f8b7df/nofafodotamolaluti.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b5cbcbfe4dee78451e6a7438b6417b80/4465606191.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/61524974105.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075617e82c7d---97938875082.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000194cc.bin
1810dfd5dcf01b30800f7ce85d2a1e30e614e1d1ac0fcdebd62e4cdcbc93c628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194CC 10584 bytes
font_01_sfnt_off0001acff.bin
e5df5031abf9a82ed7e1439e890b00f0e63881e2089a7d15918e1aa84931cfef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACFF 18076 bytes
font_02_sfnt_off0001dd1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD1B 16792 bytes

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