Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf638a2ca7d16e7…

MALICIOUS

PDF

83.5 KB Created: 2021-06-27 06:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2364b9d123508f41754cfc2fb005aee SHA-1: db5ce81eb0616e4c5815efd39f140f551d09049d SHA-256: 2bf638a2ca7d16e7b07d0fc6f03d030e9f4bc9b1968ab7d3238a9696799cbcdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to lead users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://infrive.ru/uplcv?utm_term=how+to+build+a+modern+mansion+minecraft
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25d35b32aa---wutolotezebanafo.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7e9f610cd2b1aa364325b2fd05bc3dab/7724830814.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/e0kg0ll32j3qkhshmd43tuij34/tasalekaxinabipijenovu.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cabea48531---57273528624.pdf
    • http://vom-ragnaroek.de/uploads/file/96514435021.pdf
    • https://tmtteks.com/files/supazefulesebokawafili.pdf
    • http://csc010.com/userfiles/file/20210625233415_g3m7p8.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d000f2b2f44---pokukisonetulur.pdf
    • https://ajitcoatings.com/uploads/mijanawumedevemulixikokar.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/08b6199c6853a33b430ccc07cde17bd1/goxebamulum.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e145c2388---buvoliseritu.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19c3305f56---45323892962.pdf
    • https://horizontire.com/userfiles/file/xewotuwowopipaw.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed44fd7a88f0c652d67bd46374674d7e/78890252546.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/6ksujgomtqcb1tlttif3i7oaj1/64555794496.pdf
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/senewabibetukebifiz.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/385f4adeb73e41f7fa9a81740ec607fc/noselobolavofilebe.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cbeda7c0e---33257797580.pdf
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/nujarokume.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/aa0f6584e6b914c3f9f3bcd6a6e8b264/56731920482.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d29a85909---potufaxolapizosofow.pdf
    • http://thedreams.cz/files/demaz.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16076d6a38e251---10383630065.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c85f47101d---filatuzi.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_off0000e0cc.bin
f380ebfc8fcb803a0f0d87ffd872b39a3c75f791e9303e7340f11b12f4a82088		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 17684 bytes
font_01_sfnt_off00010f17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F17 16792 bytes
font_02_sfnt_off0001272e.bin
af620ee5a45e4b8fd1552e888f4d940618ada3c7be55c8b384f703e623b0e826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E 10952 bytes

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