Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9b00fed3091ff4…

MALICIOUS

PDF

73.7 KB Created: 2021-09-05 21:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b983fe7fd70186415cf0445b6caa167f SHA-1: fb4f79e1901b79594dc502b25b8847ccaaa3fea8 SHA-256: 0c9b00fed3091ff45aa168e07174371adf91d2901aeee1924cb002b65bef36f6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. The embedded URLs and link farm heuristics confirm the document's primary function is to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://coebmsf.com/userfiles/file/93699711273.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ffbf7f29a---13509483508.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tituvenujan.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/sufebisinen.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c63848d32f3---tixulebedirolabapikawog.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/pejunutitefagum.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b80eac7b399---xapewinitij.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/wizixutebiwavifupek.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/rirukoziforalawa.pdfIn PDF document text
    • https://khanikango.in/file/82607813299.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161004f7b86347---parilovamagotodibonedota.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/ziwawi.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/biwenota.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/kunofazug.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785340e9dd4---6705706700.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202106/1623282181.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/litujun.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/bupimuzarok.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/wolebejolakuku.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/55027580694.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f99e9f8f8---jomiwepedotowepebelos.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/18257066093.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/ninisiguladud.pdfIn PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/futalusil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=manipal+manual+of+surgery+5th+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0C 11284 bytes
SHA-256: 4e9714b463ad84e19f4ae7dc79b79b177cf5cdf7e0d88f7f6bf5679c81b59a1d
font_01_sfnt_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 16312 bytes
SHA-256: ae705073793e9ac47498a5bea221a860159193a54ffe3478f120b7decd7911b6
font_02_sfnt_off0001015a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.