Malicious PDF — malware analysis report

Static analysis result for SHA-256 51fd5c930451df04…

MALICIOUS

PDF

85.6 KB Created: 2021-07-08 08:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6363aa176cd284f37fd4c20bb9db0b65 SHA-1: 57034a6ec493681e6563856ea43b93aa292276ad SHA-256: 51fd5c930451df04fdf72497895ecb94a27fb9e97b14226fe4148f6d6fcca3e8
96 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. The embedded URLs suggest a phishing or credential harvesting attempt, aiming to trick users into downloading further malicious content. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://hopkinshigh1966.com/clients/1/10/1054c114374c88b4a165e91103565d41/File/vetarome.pdf
    • http://banquat.com/userfiles/files/4841885509.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/f3c8adf71c68c516e0379700df6d207d/41396652672.pdf
    • http://narnivet.com/userfiles/files/kuzuvifukuvigita.pdf
    • http://westmont1970.com/clients/1/1d/1d0046bffbd1a03ca32bb02538d2ceaa/File/34526156353.pdf
    • http://csc0535.com/userfiles/file/20210618161542_s3x7lu.pdf
    • http://egonseetour.com/FileData/ckfinder/files/20210623_1D8F2FC5FB74A7FA.pdf
    • https://locoffice.ru/userfiles/file/davoxebi.pdf
    • http://gildiamasterov.ru/userfiles/file/zigaduvomapexal.pdf
    • https://zapret-rf.org/web/img/podborky/files/42193285849.pdf
    • https://codecs.ro/images/file/nefunepolojif.pdf
    • http://womenscouncildallasarboretum.org/clients/85748/File/rivaremobu.pdf
    • https://its-bulgaria.bg/files/file/81679627250.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081f384901fb---57409323735.pdf
    • http://grandchainfamilyfoundation.org/clients/85333/File/modefugigizodegiwafo.pdf
    • https://hirurgija.me//files/98470853705.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/11da0aa14427a6daca25883fe7233a4b/17406261796.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad2fac161---31428536012.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/3ca6a34623aaf9016f2f5a5bbd9c86c1/70991896440.pdf
    • http://altelaw.com/uploads/image/file/38597663063.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/67c3pvnm2lege0batvls50nu2i/56330541236.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c70065b397---bibis.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5dd4339d2adb5f6571a763868017e24f/65666550986.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=all+about+love+bell+hooks+chapters
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • 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_off0000f17b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17B 16792 bytes
font_01_sfnt_off0001098d.bin
2908fb67ba33a866777006d95d5c3acce49e8acf4fa76aa9032ffe1489decfeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 16896 bytes
font_02_sfnt_off0001352c.bin
973702e97f307463e76cc89b58d73624f9d6a044c08d48f1fda73d18ebb6970e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1352C 10652 bytes

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