Malicious PDF — malware analysis report

Static analysis result for SHA-256 075d1fbec607faad…

MALICIOUS

PDF

88.1 KB Created: 2021-07-01 23:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f9d130720ce27ff58d19db621da42ad SHA-1: 2b3c0d5696d5a2d231d547b3d193e255c68da224 SHA-256: 075d1fbec607faadc2f18cae7f7b460e7e4488f3e99946d8e7f131cc19231881
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to PDF files on various domains, suggests a phishing or malware distribution scheme. The wkhtmltopdf authoring application is unusual for a typical document, further raising suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://artospace.com/pics/file/seregukotese.pdf
    • http://astro2sphere.com/admin/images/file/43027194126.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7372fb46a5d01c302649069450b99715/8374463378.pdf
    • http://topas.lt/userfiles/file/pofuduge.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4c4d010733c880310a1b08a904bf2744/14011858670.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2b8dcf71cd35d2d896c0efbb9db7b346/totezugezesifidomanasig.pdf
    • http://klhl.com/userfiles/file/zafibas.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/57839177381.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a544c9a975---jutisikobomuwovepetaviko.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/5dbcofnnlholdlblco4f8103bc/39413661767.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160d276020e7d0---matujevobolilokowod.pdf
    • http://bigband-ulm.de/userfiles/files/61723797786.pdf
    • http://sgyscom.com/upload_fck/file/2021-6-26/20210626162024864575.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3d9f9f399---guvonefuzugenesamaxafaku.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073a95222585---51860243138.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8ad79c17e13d6c9587446b90c91e92e3/wuvusowinid.pdf
    • http://mosjob.ru/images/file/xumag.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f87594a7306674f80a4af35b0e1fedab/50029893201.pdf
    • http://tms-operation.com/upload/files/58580344861.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/0321b3f65c816c47cd026678474c5cd3/palos.pdf
    • http://deltastal.ru/userfiles/file/fixaxujutovifijunupajuka.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/54ed3041c24d6ea4ff1a1c7e50da9e2e/7771796468.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda13f09c4d---24237513199.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=international+tables+of+glycemic+index+and+glycemic+load+values+2018+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_off0000ee74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 16792 bytes
font_01_sfnt_off00010686.bin
9ca869f69e02ad4f9bd38302326e0c7d17e27f1120a83194d919dcb926821f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 17220 bytes
font_02_sfnt_off000133d1.bin
c81998f43253a528741b697f693f5deda9b9c0fd8fa852d44968afd83dcc8ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133D1 11936 bytes

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