Malicious PDF — malware analysis report

Static analysis result for SHA-256 0230fd84616da223…

MALICIOUS

PDF

88.3 KB Created: 2021-06-30 22:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 047295193e12cb2d6e5f290936d707d3 SHA-1: f17fac859eecb5ebe418205877cf1c9c0d0703d2 SHA-256: 0230fd84616da223a55690ed16fd6487af412006946f80a55d3a6acee3fbc199
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to WordPress sites utilizing the 'formcraft' plugin for file uploads, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160802545f1781---ligososivuxix.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160934cc534bf3---roxokivezinuxazomedasut.pdf
    • https://aravlicraft.com/cmsCart//upload/file/jinepuwisidozuweloleruru.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be74d69131e---1499196933.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb58c38a1c---vorajunovuxilubodov.pdf
    • http://aucoindeshalles.fr/menu/file/54124751314.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5661955a68---xudaguviru.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4a48d5423e871a3524f7e94ce372a685/24078774182.pdf
    • http://thecreditcrisis.net/clients/73966/File/watakelikebugavebe.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/ac4907082d38bea9a0d5e1f0ba5fe46f/lopolukesimamimufi.pdf
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/53568786695.pdf
    • http://akcjonariusz.com/UserFiles/file/satafagewukewefilukuzun.pdf
    • http://prodottoitalia.eu/userfiles/files/somopejaz.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160887e3b0a55a---xavawevudafigilotaxawoxuj.pdf
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/tifaxuwavatixowazuvozoxo.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/5f0767dd3d3e1807ebe9455cbb75afca/17945481369.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73cf6660f2---58693314372.pdf
    • http://alnadaoil.com/userfiles/file/saxasap.pdf
    • http://salukool.ee/upload/userfiles/file/11277674105.pdf
    • http://zovsh.com/Uploadfiles/files/sifamikokuxokejurozip.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160701942a3f2b---79450952523.pdf
    • https://locktactyuma.com/userfiles/file/43969110518.pdf
    • http://ownlines.com/upfiles/file/64672385512.pdf
    • http://ausafe.net/images/art/files/83194276937.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=after+we+collided+full+free+movie+english
    • 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_off0000f2f8.bin
5ee13d913a38a22ff886212fb952bb01faf15eeb721bf2d95e98ac80398e4428
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 10996 bytes
font_01_sfnt_off00010c2a.bin
995d9dd5102a24265dc94d7ed7e2bb6bd8ba3f3deec85696e3ba97b44f440c44
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2A 18128 bytes
font_02_sfnt_off00013bbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBD 16792 bytes