Malicious PDF — malware analysis report

Static analysis result for SHA-256 deda50fbc0bb76d5…

MALICIOUS

PDF

75.2 KB Created: 2021-09-17 23:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7e1c5297e4c98a4635f1b676ade5985 SHA-1: f738d0c0b9b833e780cb500223180672c120fcff SHA-256: deda50fbc0bb76d543ae3aa1dd148b647aea405cf4ae98da328f980af5653944
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or delivering further malicious content. The presence of numerous external URIs, including a link farm heuristic, suggests an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://anfauglir.com/images/file/fepebekexurezowexidaros.pdf In PDF document text
    • http://pitin-akutsu.com/js/upload/files/pupevadasadapobawafobuno.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/luzopefovaxudubame.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/40228289138.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/53800891467.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/vakejamogagumulusekiname.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/takokepadax.pdfIn PDF document text
    • http://nscenter.cn/upload/files/vowasi.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/sulatafufotufiguxo.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/5983536695.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/witunogokepumimo.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/5218113066.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pskbpnqk19vb8b4kbat18mje13/kowujewubawunifomepiv.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/96697604735.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/xuxuwunaw.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/turawenemubib.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/pewumujivonidabupirik.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/fonanotisusijulegugafeka.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/1201069649.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/72240882297.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/54269313337.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa2c23f6be---vadep.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/tixekakaxalirumu.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/56148841006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=medal+of+honor+game+for+android+free+downloadPDF 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_off0000c30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30C 16968 bytes
SHA-256: c1e0b107ba7d57ad8be58fa7d5be0654754f1a6dd6df1cb7154064d2f5060df6
font_01_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 10616 bytes
SHA-256: aca1721e3cc8afdf9f5e5b442228cd0b5ef76def3674b7da47044af34349773f