Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da06c5fb063f7ba…

MALICIOUS

PDF

90.1 KB Created: 2021-09-21 02:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ca00ff2db1b0e953cab38def8c65ea07 SHA-1: 8d1dda3b4847c2ee89800f8fa272b0ab7bd4aa37 SHA-256: 0da06c5fb063f7ba30d38b0c771bb0593ff231dc7b587edc697b1b9ba7d59d90
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous external URIs, with one specifically pointing to a URL that appears to be a redirector for downloading software, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall structure point towards a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=camscanner+mod+premium+apk+download PDF link annotation
    • https://baoyi-chuck.com/ckfinder/userfiles/files/15594951653.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/95055508081.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/zidif.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16135f195865c8---nokave.pdfIn PDF document text
    • http://bubb.cn/up_file/file/xisigikifapafakarid.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/44006912345.pdfIn PDF document text
    • https://fond.ru/userfiles/file/42391725691.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/35714209640.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/5186353348.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021091417223870554.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/18655273929.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/jagonufivesavinugukake.pdfIn PDF document text
    • http://goldmustang.com/files/files/fefemuv.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/fowitatofepujoruruloga.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/25405011000.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/gonebezatoxutosovaz.pdfIn PDF document text
    • https://solturism.ro/images/file/10898653849.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/kewegazenupetewaleju.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/zanurukerivusozosadujifaj.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/37886176192.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/28118011203.pdfIn PDF document text
    • http://dytac.hk/userfiles/60338675536.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/54264325763.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/wajozogud.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kfi4903eb3r48oprqkdf2ls1v6/37034267462.pdfIn PDF document text
    • 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_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 18288 bytes
SHA-256: 52ff50a349c6f1e8ff2ed86b8c9a6295a6d739696a8552b1d7878b9e848a6950
font_01_sfnt_off00012943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001415a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1415A 10888 bytes
SHA-256: 386e050aa3543d23c8ad62d309c4657439ffdcf604c2e0fc40edb76a136e1b11

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