Malicious PDF — malware analysis report

Static analysis result for SHA-256 867f8702ee58e121…

MALICIOUS

PDF

103.8 KB Created: 2021-06-26 19:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb4b0127f1e850971f186c204b7e1eb6 SHA-1: f775046b9a97ccdebaac6bd79c76217f4098e7d3 SHA-256: 867f8702ee58e1217aa3f02685e295534ff8387b1d03a80e4dda49e9234f3aed
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e248f8fb79078cdae48f930072b229e3/tanewagapimi.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd724f602---sukadutob.pdf
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/tunelojazabekow.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ce24ea41852b26ad8225b739ea4b19f0/34813065113.pdf
    • http://worthingtonpark101.com/userimages/dazigas.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09670cf1a4---tizose.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44f579a6e3---64571715804.pdf
    • http://teusz.pl/UserFiles/file/lasewirokufijapewab.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/4ca0ab9226ae6cd2cc82c1f52ef0c531/bodubujaveritutume.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/355c0ebba8616817629a0fc1431b9c56/savazujen.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/raxisifelodemelif.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/ccc7e592533eb4f33dd76d365cee8503/vavesiza.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085116ec05ef---33225805031.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/199b5001c31118983346aa281e8e6204/woxujapixipavifenapopisu.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/d0a3rcj09g66moakqkuuiit7l4/xevupurugozuran.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/e257e164026144232d3c2d28c7dd3844/11090915607.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210616192238.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/rpqlnq41457kbc6g52nm43j6eq/25142336958.pdf
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/27543454427.pdf
    • http://atomleasing.ru/media/File/nepajufusajadizokurijuse.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4dcd5a48b---navotulovuzabelugudob.pdf
    • http://sp3siemianowice.pl/userFiles/files/35560393129.pdf
    • http://mebelhotel.ru/userfiles/files/2359693808.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=replete+meaning+in+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000ee6b.bin
bb109633fcedaa013e75167f88d3405f821e402a7a06fa4898742b32344f6e09		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEE6B 19960 bytes
font_01_sfnt_off00011054.bin
6f3210eb808b10f4dce826ffa9288a501c452c294e2b0fa29347032ef522b9ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11054 25812 bytes
font_02_sfnt_off00014f2d.bin
5f9d694227ea338870b8c47d000a82dca3a505506aff6d31536300a3078594cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2D 10524 bytes
font_03_sfnt_off000166e3.bin
8f097dbd2cda3e0c0a277350ab04a3f0f4c84d6050e304ddc89f4f7ab56c4fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166E3 4616 bytes
font_04_sfnt_off00017794.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17794 16792 bytes

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