Malicious PDF — malware analysis report

Static analysis result for SHA-256 edafb8ff96dd4eaf…

MALICIOUS

PDF

90.8 KB Created: 2021-09-12 15:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 077362edc121acfc175188c8db4d8492 SHA-1: 51b76bf854513d40df148bfc49966226cba3132d SHA-256: edafb8ff96dd4eafc4f5b85177db7d54b1dca73ed2668e8c0e077dae6adead35
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to domains that appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cancunday.com/travela/img/files/51294323172.pdf
    • http://almawred-sy.com/files/adminfiles/files/9864768521.pdf
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/derudekemureb.pdf
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/lemilavatiduluro.pdf
    • http://alothongtin.com/upload/FCK/file/puvowewolugifaxuvod.pdf
    • http://chothuexeninhbinh.net/data/dulieu/files/66773354776.pdf
    • http://umrllc.com/userfiles/files/83075283267.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/27642980276.pdf
    • http://mobitransjogja.com/files/sameno.pdf
    • http://fields-on-earth.com/images/blog/file/55700249146.pdf
    • https://encoyun.com/calisma2/files/uploads/verusinavifofebu.pdf
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/56629732217.pdf
    • http://autolubitel-irk.ru/userfiles/file/wuzumakakevubib.pdf
    • http://daimarconstrucciones.com/images/admin/file/ponuwubaxivamafi.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-9-10/20210910205722814674.pdf
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/mutafujalufuv.pdf
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/19629462131.pdf
    • http://yonezawanet.jp/units/24250/zcycom/files/40189589573.pdf
    • https://mr-alian.com/upload/ckfinder/files/ximukalet.pdf
    • http://health-bridge.in/upload/file/32952487252.pdf
    • https://perfecthospitals.com/ckfinder/userfiles/files/51876370141.pdf
    • http://polipadel.com/userfiles/file/lunup.pdf
    • http://adec-interiors.net/Uploads/file/zatatukefutedenasuv.pdf
    • http://interroadholland.nl/userfiles/file/bipetejowezulafe.pdf
    • https://toptenstudy.com/upload/files/BodyFile__613DF28158957.pdf
    • https://wineuniverse.us/userfiles/file/medufuviduvuboparot.pdf
    • https://mar3ol.com/Files/files/zavawivono.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=you+call+it+love+full+movie
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fceb.bin
80ca25f320bbc5f21fee5c599f3826bd5a4686878a8066a7b7bd94ba60f1e5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 18724 bytes
font_01_sfnt_off00012dff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFF 16792 bytes
font_02_sfnt_off00014616.bin
1c25c13db915588bdf60bac93d313d3084ddcaf9e032bec3ccbc150770df018e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14616 10276 bytes

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