Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba812394d0684814…

MALICIOUS

PDF

90.9 KB Created: 2021-09-23 14:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee54036ca6ed1f9e6cee981b50fd56f2 SHA-1: 08475aef78988fd51d2f5bfc330fe51c4bb3ed7d SHA-256: ba812394d0684814682bd8e229cad0b6802cafaa07c6b0a6c475e289fbac8ef6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which point to disposable hosting, suggesting a link farm or phishing infrastructure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 https://infrive.ru/uplcv?utm_term=war+full+movie+9xmovies
    • http://permanentnimakeup-brno.cz/userfiles/files/wepixenozili.pdf
    • http://twgo8.com/uploads/base/files/202109050832229033.pdf
    • http://tcgardening.com/userfiles/file/2021091722200873499.pdf
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/xubefapomosiletetotapaduw.pdf
    • https://braveathlete.net/geektic/files/gelexomobegobisagesuko.pdf
    • https://nikolsbeauty.com/webroot/f/uploads/file/11729977992.pdf
    • http://3asoft.vn/img/files/kumol.pdf
    • https://sokole-tps.pl/userfiles/file/4673786013.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149c166d44e7---rugulekoletebagodisi.pdf
    • https://alice-immo.com/userfiles/file/49003832774.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/guvikezuxik.pdf
    • https://tonymusic.se/UserFiles/files/xareperumaluzupetowoj.pdf
    • https://gaadalagi.com/contents/files/simesox.pdf
    • https://vildmarksjagt.dk/userfiles/file/fubewajixakoferevatorelum.pdf
    • http://fundacjahfg.pl/upload/file/sezozakiw.pdf
    • http://musicandyouapp.com/webupload/editorimg/files/bamuvo.pdf
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/12483498112.pdf
    • http://paradoxine.com/upload/files/pabulugi.pdf
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/50342459013.pdf
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/4518644585.pdf
    • http://splhardware.com/UploadFile/file/2021092001571773499.pdf
    • https://ksi-system.pl/editorfiles/file/zipavekorok.pdf
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/mapenizoxusiv.pdf
    • https://lapdonline.org/file/42695402162.pdf
    • 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_off00010136.bin
8421aa0423a371d4ebe29ffe603d261fb0d25f188507be2f4ff7e61ac01995e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 17228 bytes
font_01_sfnt_off00012de1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE1 16792 bytes
font_02_sfnt_off000145f8.bin
333834a147873ca85af1d064a86de5dbfba844e365d335cdd30ec7ae2cd6a1d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145F8 10604 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.