Malicious PDF — malware analysis report

Static analysis result for SHA-256 a806318d988201df…

MALICIOUS

PDF

85.7 KB Created: 2021-07-04 01:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b5eece738c4677c227e7188d89e11f2 SHA-1: 5daf9c599ffa27d5e34603e3612f25b8e10d3dd6 SHA-256: a806318d988201df8e6ddf6a7f9201ee281c4977917472cb4c8f095a30fe6a52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were directly extracted, the nature of the links and the PDF structure strongly imply an attempt to exploit user interaction for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jetaime-shop.com/files/tewejakesoguveduta.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160db059d1d710---7564846147.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d65291db955e6094ef6fe47c3b507f6a/97132908972.pdf
    • https://pima-alarms.rs/slicice/file/70325615388.pdf
    • http://el-master.ru/userfiles/file/57968174449.pdf
    • http://voxel-avocats.fr/uploads/file/jozutegitov.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b865f78d6a2---wutujesorixiwoped.pdf
    • http://hani-bee.com/userfiles/files/xirobogofagebeta.pdf
    • http://www.lugashotel.com/data/editorfile/93826689887.pdf
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/63593044937.pdf
    • http://myexamadvisor.com/fck_uploads/files/rujitobejivuvomepalifes.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607286fb90050---93669060086.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078d88e1ef7a---didokow.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ooa6ea6o9vkllrcvn68qfs6mu1/1126234051.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/b8321f7097b31dbb307e9a2d4c6eb21f/83593096731.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/clr2ggul2chu8svs824lafup53/foxojezikuwutonida.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/up8a3gbeci1q9dvr85el0iqqlb/83888988021.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/mg9i1236nm91amgv9k6q9bmj87/pilerixawoguverizovemoxas.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac07a3804f---33555574250.pdf
    • http://cutencuddlybreedables.com/_images/file/jawakom.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a03935f3de7---jesubaxodafigabarukefav.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608530511dadb---544468316.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/077fbd60a54f3b43efd21b2bd716fd28/26421653878.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/8693d715d4bf3744e3847f1bc9a3ce04/48344092631.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=english+class+11+question+answer
    • 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_off0000ec93.bin
a16712596f570253e4bb0544ffb1031f9763a07fbd0b8fe42bbd086e05dde288		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 16828 bytes
font_01_sfnt_off00011842.bin
4f31a69c978d14fae01bd7f260001488c65cd550d2eace7dd19b59a52d361193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11842 10876 bytes
font_02_sfnt_off0001312b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1312B 16792 bytes

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