Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7e2ff45937082f…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 01:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff0957c7c65d5f8430432b2123372869 SHA-1: ce9877bf2cf9321f1742d70c01d85c3d315f59d3 SHA-256: ce7e2ff45937082f9c6c12602be329b9694376ec1bf85007d00e791f4f0d74ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external links and the overall heuristic findings strongly suggest an attempt to lure users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=how+to+edit+secure+pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/7b17c17a564b25d6e912a3244b412941/15524144508.pdf
    • http://www.jindatunnel.com/up_files/file/fuwulekav.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3e631be9f---mujazutasidetexi.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/afcac379b81e2c5f78174ec435b7a0c5/nimudorejedo.pdf
    • https://alshaabcoop.com/userfiles/file/12023256760.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0fb374baef459ba7e14446ba540e1a2b/mepogosulobinipef.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/d76428fdb2bd6842a60da7aef80238a5/setez.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/e6a033su56ihkqvkj3lnfnf1f8/45203755756.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082816d0a938---83532762057.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/at8kukfhr5b6houb1uqbmbb346/damuwilefozowizu.pdf
    • https://akapacha.com/userfiles/file/28298699376.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079dc77a2d79---14650056234.pdf
    • http://splogservice.ru/content/file/5253713547.pdf
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/61178907306.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac800915a---famisatejagasuwapoxevadi.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9528c7575---82360997854.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1ec68ede---rawubiru.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160890549e38b4---zujatasinunid.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607758fbe564d---62728882154.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac290b079---setenobadubirosepujofama.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/0af16b32ed1068bedda42f36a39bfd64/1410319094.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/vkvih7pn0i1tob8478rlqoelir/biziju.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_off0000fbe7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 16792 bytes
font_01_sfnt_off000113fe.bin
4f484c133d97be08ff8613e1fafd7ebf8b21b33f180246c5d83383217d4b49e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113FE 10476 bytes
font_02_sfnt_off00012bf4.bin
2c97b541b6d2be68b7361709dc61bf1ea65a1f3a383073b7fe7a94ee5a74aa3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF4 16844 bytes

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