Malicious PDF — malware analysis report

Static analysis result for SHA-256 cced783761e7c285…

MALICIOUS

PDF

81.8 KB Created: 2021-07-18 22:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94535994bb3726c61149ad0d97563cd2 SHA-1: 2245b98a508ee1f0ca5dae809dd3845cf03f38b8 SHA-256: cced783761e7c285d942bd085b93a72e2f11488a61c74afe4811e0501f8a57fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5a09a9j2uf1dsrmupah5df6ra6/91646092970.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609069c746c00---79340574191.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25917a0cb0---siposiw.pdf
    • http://ropesadventure.com/d/files/zorukorobapikob.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9f0b10d0---80286629327.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608cddb4a308e---6132569105.pdf
    • http://banhangcongnghe.com/upload/FCK/file/25943870867.pdf
    • https://atcotourismtravel.com/userfiles/file/47304643090.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/7vqubl2plb26s08r5mdo7lopci/zedotusexetelofa.pdf
    • http://www.niziointerior.pl/upload/file/1800124357.pdf
    • http://ibconsulting.it/userfiles/files/97183282735.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160831c34b8731---69671413618.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b86ee118471---67654554850.pdf
    • http://domholidays.com/userfiles/file/11376070598.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607916de67a61---jasepujudeb.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a271b99a638---puvuluxa.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a89bd633200---89473615018.pdf
    • http://hanart21.com/files/userfiles/file/kukapavokejipuzilov.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/abac8j9gsb7akqd65kg2gmdvq5/xilaxexadanel.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8d443146f---6880017939.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/s4p3v7spe6sr2qnj85tu16v2o6/taxufefadudunokadeta.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5329fc3b206382bacc75628efe9d7d5c/33463781841.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=word+that+rymes+with+orange
    • 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_off0000df73.bin
d10174271e2d1991ea661e22e626a7bac0b438581160fc806f0c3a9777faa350
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 10840 bytes
font_01_sfnt_off0000f830.bin
245b2be8d0933b95bee0db71ce447eb764114ae0f4d7550e3e12277ca0f00829
pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 16448 bytes
font_02_sfnt_off000122d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122D9 16792 bytes