Malicious PDF — malware analysis report

Static analysis result for SHA-256 18043292766adc6b…

MALICIOUS

PDF

78.2 KB Created: 2021-05-16 03:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72270eea776b0a0682eba6cd27ef9de7 SHA-1: 266b0fb0fac757d701f75dd25bfad4f2d4496256 SHA-256: 18043292766adc6b41518d65ded59e9b96497307a2599b615cfb923c2616f735
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URLs, though some are marked benign, point to suspicious domains often used for hosting malicious content. The document body is heavily obfuscated, but the presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4fe3c11af---74468546055.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608864c444a79---minesovexomub.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090abcecdcd1---jamitoxibuxesiwoxetewox.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd8efaacb0---90596129683.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609830f42ec48---jemezawebatete.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098b216da987---76081673709.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a46378fadb---javisazegiz.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c0dca9b6---bovikuligawabipomarewax.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d666a6b234---14711498064.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe653de2bd---gexusizutido.pdf
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/2edc812c8f47dc1b472c33e6c0fbcdd5/zozewokefegawidujewiburiz.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb7d73bdca---lipunimarebaporadalusi.pdf
    • https://aulacvn.com/upload/fck/file/35739771977.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=twin+bed+sheet+set+target
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e851.bin
8ce61bf112df96a53d34dd4db97211a0de15a3028df33a9242af852b94061d91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 4912 bytes
font_01_sfnt_off0000f8fa.bin
6eda2667e6638dfd6515d947546571428cf63cc4fe590d377a675465355b7ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 10956 bytes
font_02_sfnt_off00011e2e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2E 4324 bytes

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