Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7b137ab9f68d63…

MALICIOUS

PDF

75.0 KB Created: 2021-07-13 00:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63cd9e702c6389fdb5968c1f6bac05fe SHA-1: 41d7b3ca6dfcfebc106fb45330ce62d825498495 SHA-256: 5d7b137ab9f68d6306704b291239f4db9de7c83573bc4fae293b791e8ead99ac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to a Google feed proxy suggests a potential phishing or redirection attempt. While no scripts were explicitly extracted, the PDF format and the nature of the detection suggest it may exploit PDF vulnerabilities or employ embedded JavaScript for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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://feedproxy.google.com/~r/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=nifty+bank+futures+live
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e916ae66be7e490f0f3354/1625888430911/71049979818.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9386cd1a1204f6c97e33/1626116999153/1418104248.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f8ed19a9f87deb7120f0/1625880813141/80948607736.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_off0000c301.bin
959032eae22e5d9cad05c9c1aeee7e2aed63149904a1acaa52c5963a101a018c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC301 10576 bytes
font_01_sfnt_off0000db5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 16792 bytes
font_02_sfnt_off0000f36f.bin
0bc13b86bc0e480c90db9097a842c9333a7d54a7c8c7e79b2d2b7f3d318222f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 17040 bytes

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