Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac08b994a51aa8b7…

MALICIOUS

PDF

74.0 KB Created: 2021-07-18 01:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c70ccb4a7fe08123cbdf5a27851eac97 SHA-1: 5e141c186d20c749709768992805aadd0a68c218 SHA-256: ac08b994a51aa8b7631405867e5e7648488869be936325c6e0670cecc325ed72
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to further malicious content or phishing pages. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple embedded URLs suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=aircraft+electrical+systems+ehj+pallett+pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edf1bca9d1f62037e4f576/1626206653153/download_chrome_version_75_for_windows_10_64_bit.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e86f470c9c5f4f141c3585/1625845575151/98850308319.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca908e0ada229be5a6c04/1626122504346/sujuniveto.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f17c87425b7b7417893d47/1626438792022/astrophysics_for_people_in_a_hurry_free_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f34a759ee5897bffa1fe16/1626557045670/mipetatuxiduda.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_off0000bdfc.bin
ebd470416122c272b3fa6dc144edf0d1a6c9bfac58b993bfa050962b19adc857		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFC 10888 bytes
font_01_sfnt_off0000d726.bin
e8b800d573cb36840b9737df68c04f41e6d352403268bc3e33f308508319a098		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD726 16512 bytes
font_02_sfnt_off00010216.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 16792 bytes

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