Malicious PDF — malware analysis report

Static analysis result for SHA-256 7174367598dfcb74…

MALICIOUS

PDF

79.8 KB Created: 2021-07-13 22:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36612f601563a806ebe357e07e609deb SHA-1: 71bc1ef52d85d5605126c256d0348553b452c11f SHA-256: 7174367598dfcb74630eb1b65fa7dfdc91e36d86fcc7f5731a3311b39c2a5cd9
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 presence of embedded URLs, despite some being marked as benign, suggests a potential phishing or payload delivery mechanism. The PDF structure and embedded artifacts do not reveal specific scripting, but the overall detection points to a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/aauXj3bnHUA/square?utm_term=5+point+star+in+a+circle+meaning
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec80cde64ce53716348bc4/1626112205524/4702523447.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7f9856d117d6eeca57946/1625815430017/bazezaberoxetef.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7e27defb14d112211a25d/1625809533908/13004907570.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8ae770d7388251f4f2fd8/1625861751205/nursery_rhymes_the_ants_go_marching.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_off0000d57c.bin
f72bf4495bcdfc14d37387b00bafa2b0acfb82423f33fd82f31701f72ad83869		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD57C 17240 bytes
font_01_sfnt_off000102a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 16792 bytes
font_02_sfnt_off00011abe.bin
7e2e12c9594e42194cf00babaaf10d8ff44ee134d2d1fdc39010cbd4fcb08901		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABE 10756 bytes

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