Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ba50b84d9a8b5c…

MALICIOUS

PDF

87.0 KB Created: 2021-07-01 11:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccff9601617e062e63e29b899d44c780 SHA-1: 2b4157a1653fe12b0361b094b58b14dddd96e2a4 SHA-256: 43ba50b84d9a8b5cc088cb2478e84eef5e1a9ced4f31c72eff1692955c2cdedb
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating an advance-fee scam lure. The document body is heavily obfuscated, but the presence of numerous embedded URLs suggests an attempt to redirect the user to malicious sites. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jcbcharpentebois.com/ressource/site-image/files/ralibibaf.pdf
    • http://extracam.es/app/webroot/arxius/file/zizifagezi.pdf
    • https://vildmarksjagt.dk/userfiles/file/zavorisosuwobuzarinekoj.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47b764024f---puremogurelosu.pdf
    • https://aashianarealty.com/file/solerujuxefipulofip.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/76f949cf51458407c13c12d0cc375b6e/33798704060.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f89e00a49ed57f963614a4933fae7744/51442006933.pdf
    • http://shelton1961.com/clients/35589/File/81061162912.pdf
    • http://megat.pl/uploaded/fck_files/file/51778185576.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853d9174e54---45193706640.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c7b89d69---lebikobimepufalarafewisi.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec0535cd2---sikazuda.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080e02233b11---65087663262.pdf
    • http://webursitet.org/Files/file/18992002225.pdf
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/43128044081.pdf
    • http://woodwork.pl/ubezpiecz/obrazy/file/97179731641.pdf
    • https://betentour.com/sites/default/files/file/15534171290.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f20e51f385---nevufowakexepaja.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160711495a53d4---75273240138.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/k2nnj54s6s5559e37o155r7f1v/winorarelopuv.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727e140a5e3---livazatowopuvaramujo.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087429508abe---88261825856.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d39a9e590a---32747143698.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+compress+pdf+online+free
    • 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_off0000efb5.bin
b560abbf3c92469c88e9f48c21fcff08156cbb9d88c252e1bdf80d7dbaa948a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 10696 bytes
font_01_sfnt_off00010831.bin
bea15b8bd1519f603af73aad8555452274839d9bd32a8a9a1b5f5752f2e6216d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 17092 bytes
font_02_sfnt_off000134d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134D0 16792 bytes

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