Malicious PDF — malware analysis report

Static analysis result for SHA-256 92201c835b246898…

MALICIOUS

PDF

88.4 KB Created: 2021-07-23 18:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 012d9c8eb8504a96e60aebc76386b62e SHA-1: 3614e369a710966c800952dfc36e11872648b378 SHA-256: 92201c835b246898f68cf359ad5e3ed3940861f6f50b9993c816002432cb3118
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised CMS uploads, suggesting a lure to download a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and heuristics suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://rhodeislandalpha.com/clients/56223/File/bofogivukatudabas.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/f9e3d5413077531934edb109df175d42/bugorilenidow.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/cutr4ppnn4v02e96sgab4se4dq/98316970697.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1cec6388e8---vusotiwikenotesa.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/16905628613.pdf
    • http://gursakaryahukuk.com/images/file/kovegezunizuvekajikuk.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/0siivr7k2nko3lbutrvih6des4/68320757024.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b99ab97ff---31827796333.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822bf9de32c---26382378923.pdf
    • http://goodslib.com/userfiles/files/balerevasimamib.pdf
    • http://www.look4job.gr/images/_user_na/file/nolunofojemekurugewo.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/2e4b325n8gv73e3d8f25vmubfr/dafudapimobiritanilubes.pdf
    • https://augsburger-dartliga.de/uploads/file/kazivedilupekelekabi.pdf
    • http://palirna-frydek.cz/uploaded/file/65418654749.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff11521c4---moxomozulakogamixiro.pdf
    • http://ndt-tl.ru/upload/file/gitipaganako.pdf
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd9d710c2---penenilotebetulive.pdf
    • https://northwestconvention.cz/data/files/72558688376.pdf
    • https://eslms.com/userfiles/file/xarokalutizeredinuxudenuw.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7703912f0---13908392168.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/70df45f51e63998e7c467add8ca5bf7d/30554552062.pdf
    • https://vestol.bg/files/file/90923593773.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4cc098cfb---kivaka.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+ets2+indonesia+android+mod+apk
    • 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_off0000f3bb.bin
79fdaae0601412d53876818bcdf6246ae3ea93f5c2202904371500d221471d06
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 10852 bytes
font_01_sfnt_off00010ce8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 16792 bytes
font_02_sfnt_off000124fa.bin
6a04d220de1964cc3610e7c1d45215a7b2eda9850fcfee5667cb4022ac71a86c
pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 18744 bytes