Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ce9387b6686140…

MALICIOUS

PDF

95.6 KB Created: 2021-07-06 03:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7a1c78623d94289a52c015937ecb46f SHA-1: f43351448146561a8e57fe81e6072a353c554156 SHA-256: 05ce9387b66861405763798fa56aed3cce0afbead3392e5946c3b2359e05679e
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 compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, but the structure itself is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://cochleartudaskozpont.hu/files/567819301.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/f7f9720389d68c655206615dcb0d2ac7/sinepizosinuzadiweser.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995e1051426---felel.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64cfdb71d3---13962387846.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/cb64d091b367bfdd3e5872e990666188/fexaximavobiluzujana.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8cc46c61f3116f6f50b7074d911e44b1/77240199986.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/18c54f2536e90b63ef4e5c7834410a7e/savofalugojurilarilutet.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b80709efe016a886f7088b9ad05e873f/nurofemuliwugexuwozisun.pdf
    • http://pospatrans.cz/UserFiles/File/62407770658.pdf
    • http://domholidays.com/userfiles/file/rikulisewipenuditubo.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/068f3b33953a9bfc91572fcbb98e67b1/52687365585.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f47bc9903---jepoxilexebume.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8da3b06a04---wazevibitem.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad7e2c36c2---9949574416.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aab4557f5c5---30871902472.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7f479d424a19b171e68038ab98e03e3e/pamos.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2e7861ed---79621295112.pdf
    • http://0-50.ru/userfiles/file/36372515695.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/62def1608b50c94c349ca6477651696f/vanadikubera.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/55010490a26e45d8b8f9fc858590ea86/15643053520.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f2ecbb688---98173990746.pdf
    • http://ghioroiu.ro/sites/default/files/file/85180622587.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/hgff9gudl64alt7v0hvphu758r/silufirodo.pdf
    • http://capmar.eu/userfiles/file/namivu.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be4b7724c42---70826290164.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=cartoon+filter+for+dogs
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f956.bin
fd4fb9fd47f8aca5e5b4c20bf45c49acc60adb4e2c71a6091e588c0161e81ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 16848 bytes
font_01_sfnt_off00011103.bin
aa1c5bb438403a57975622dd1a4f357de10dfbd4fa89061be16ef250c46264d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11103 18216 bytes
font_02_sfnt_off000140cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140CB 16792 bytes
font_03_sfnt_off000158e2.bin
23d93b416fe9b30bcf474ad726bc74eb6f43d2b1fdea91a47fb7db4dfd321a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158E2 10560 bytes

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