Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d09a7375f4d4e49…

MALICIOUS

PDF

77.5 KB Created: 2021-07-21 08:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f45ce1764958d97e9c5b3c93999d846 SHA-1: 147661958d17c41e50f8e4de3203ee58ed7055ea SHA-256: 1d09a7375f4d4e49b3b9c1a028b7604d4e5ad028a7c9b04df945f685dfa593bb
66 Risk Score

Malware Insights

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

The ClamAV heuristic identified this PDF as a phishing trojan, suggesting it is designed to deceive users. The presence of embedded URLs, although currently flagged as benign, indicates a potential vector for further malicious activity or redirection. The file's structure also shows duplicate object bodies, which can sometimes be used to hide malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2580

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/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=general+equation+for+quadratic+function
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd843172ba47bdac2f673/1626200131707/remove_all_entities_minecraft.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee5f52f6c772366d303cd4/1626234706192/be_unlikely_to.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_off0000cc2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2F 16792 bytes
font_01_sfnt_off0000e446.bin
83195daeb05c890668206f168556689d2ef2846eb7fb49000509f97a89f7c149		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 10588 bytes
font_02_sfnt_off0000fc4f.bin
85a5a5fe44f83d8a2fb782d7f355a5ae9b755f8d88f8b2fb0a1bc3abc215f4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 16880 bytes

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