Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e2b34306890166…

MALICIOUS

PDF

102.8 KB Created: 2021-06-29 19:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf812ad2d423031a7e694d0c16a512fb SHA-1: 5014f3f95f30a7ccfc576f1c132d2404286c2e90 SHA-256: e5e2b34306890166b33da7d91aa3ff96822d3ccb05ec7ce66998a39995e94813
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories, likely serving as a distribution point for further malicious content. The presence of multiple links on disposable hosting and the use of UTM parameters suggest a phishing or scam-related lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/e1ad0b1a2c635daf3c846c2625558954/metopaxolebedaxepa.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160da65ed5ee0b---81317776635.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a0f8543f0---62649773438.pdf
    • http://asea-admin.com/_userfiles/file/20210505203439.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a112e24fe0ce323c6d1fe6a6777ac858/81071568772.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160772aad2c89f---sozegovoweroxarete.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b57d85d0c7a---41020746128.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/39446792179.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb376556eb---togumubuxebav.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160795dffe214e---21632590603.pdf
    • https://dineflon.com//files/39167397402.pdf
    • http://cokhixnktientien.com/Images_upload/files/65064964101.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/i9tombo8gotnrhbdgkk0iabei5/82337053398.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf3908d03c---28070701852.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a985a3a30ee9cf20fc06965ecc51bd72/xabejujadivijobemusofov.pdf
    • https://pima-alarms.net/slicice/file/jazomurazipevikisenapal.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160798a0eb538e---ziludubu.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/6b3077e5aa6f2fb9803e5a58b861b048/17288451794.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9c0e5ea60---43388261141.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec6fdac7db---13996002996.pdf
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85199703981.pdf
    • http://jun-travel.com/userfiles/file/93617490993.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd38e33c18---tikezepogitav.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/481d4aee381c681867bb4d96d3b6cf1f/32375030363.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/jedarireritore.pdf
    • http://backupcenters.com/userfiles/file/24007892757.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=highly+potential+meaning
    • 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_off00012244.bin
4ae8c51f4ac31f575af2fcc59ed446a7c718dfd7c08b9936af232a783b4fd84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12244 10536 bytes
font_01_sfnt_off00013a00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A00 16792 bytes
font_02_sfnt_off00015212.bin
7e6de295db7810f1815767363e46fba39ebcedfcc713e87a26bd480ac4825a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15212 23456 bytes

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