Malicious PDF — malware analysis report

Static analysis result for SHA-256 3022aa6ad0ec21c7…

MALICIOUS

PDF

85.5 KB Created: 2021-06-25 12:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8cd10131595ec3a149315421113ce15 SHA-1: 8ac076d58f1c6090d66ef636aacb1ed75993ab67 SHA-256: 3022aa6ad0ec21c7a174df9ba0c4c13c049286a943c2b6d63a3d0d4e515ef9e9
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating it is a Pdf.Phishing.Trojan. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF itself appears to be a link farm, leveraging compromised CMS upload storage to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608375040d423---23653053050.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ilbdm2tvgk94th7hpirstgga35/kobekoxusasiwup.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/86655739881.pdf
    • http://stattus.com/assets/file/63284083898.pdf
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68866608263.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aafa174413---degifamefudanizudixexapi.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20a0173089---sabebajosokojexijusa.pdf
    • http://niezapominajkowo.eu/userfiles/file/dobiperuf.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077242c8edff---94486583989.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/30859672641.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab39b4040a6---14015656738.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160794352d45fe---60852856451.pdf
    • https://adepotcustom.com/UploadFiles/file/20210517181215106.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607d44f3c63ef---rozaw.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/0d16e3b36b620c10ce51115bbe5e1bdf/gugemimojil.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=travel+guide+italy+pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ece2373225bd1c89fd66c86c87251a26/nafinejexes.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_off0000ec0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 16792 bytes
font_01_sfnt_off00010423.bin
e5bae1084abf26c49b928e98eff1b505d143f8f0192965630051431774f5f266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 10524 bytes
font_02_sfnt_off00011c02.bin
1737eba4a7a7de34f91769895b3e5641778ba985925d699e3c3c99345ebc7fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 17060 bytes

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