Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc484346cadedf05…

MALICIOUS

PDF

74.1 KB Created: 2021-09-16 02:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5bd6ccd72177ef3f79ddde3964cbce82 SHA-1: 7303b039431d8b8310864d0a7044d34fcb98c356 SHA-256: cc484346cadedf0560553df3389803f302e6d7127a35c2d98193df24650435d8
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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document functions as a link farm, containing numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://cructi.ru/uplcv?utm_term=vidmate+scan+to+download+vidmate+app PDF link annotation
    • https://trungtammatnamviet.vn/upload/files/pifirofilebezor.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/18686471056.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/rotedipavepogido.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/9432462539.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210905011227.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/21591394558.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f54375e160---gevobu.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/16757592285.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/61010193602.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/21847172847.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/22459434734.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/zogudu.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/xefemaragelojalefadadiso.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/satososax.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/87998798073.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/tupunajixituzifekowomez.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141ccc62e218---gowumitojogineleg.pdfIn PDF document text
    • http://mimpiindah1.com/contents/files/76660212581.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/deberuvosujanurivi.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210910_46FF19DD412BF345.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/zimuvaragagoladatafosuke.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/99557321967.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_off0000bfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC3 16596 bytes
SHA-256: 58789209621fea7806dd656e3d53b861be2e1b3759a444c1acd815c32215885d
font_01_sfnt_off0000ea55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 10696 bytes
SHA-256: ad050bbe21aacc02b5bd06efefd6567a18b105082a9d776824138645e646b9d2

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