Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ca2d41b2687cec…

MALICIOUS

PDF

73.4 KB Created: 2021-09-18 20:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 97b1cc31f91dd473efec4b0a20f73691 SHA-1: fbbae8c04b8f50d6d465b4bb57eceffb86836ba1 SHA-256: d3ca2d41b2687cec53b27cd644185c18dfa2edc3e25e41615e7a2e948535886d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites, possibly for phishing or to download further malware. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://tgroupsrl.com/userfiles/files/sopitanuve.pdf In PDF document text
    • http://ensky-chemical.com/upload/files/28404013108.pdfIn PDF document text
    • https://seger.cz/userfiles/file/pitivoranefive.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a83d1a1f0a---xudopisosilozedefavexaw.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/metogofebezodumul.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/takelexe.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/fedasegisefi.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/1940035907.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/95942256148.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/66286036997.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/pigiweze.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/34051043560.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/17910108045.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/berimudonu.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/tovuxopufuwodifo.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/kuroxuzaponaregumerezifug.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/g700gc14a9mghgmkcm0m7fae75/joxekezapifaziduvowi.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/nizaxajabijaraletewak.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/ritenavogidilesalamu.pdfIn PDF document text
    • http://theponghop.com/upload/files/38943769120.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/13537996540.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/jezozisuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=best+torrent+sites+to+download+moviesPDF 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_off0000bdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFB 16092 bytes
SHA-256: 17858162be9d6419e38f6b520a16792a5cd766e7a61be92ce57a287565b09cff
font_01_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 10616 bytes
SHA-256: 2a1050d585410e4ada616f40eea9ca81876ec009cc1a469ec2c744c29126a844

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