Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1fb7c3198296e9…

MALICIOUS

PDF

76.6 KB Created: 2021-07-14 03:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 162fd4b79d1bfbf8d74ba5d96622fdac SHA-1: e0dc2e1eae16a3df8cbcc4bbbb9c826899d193e5 SHA-256: bf1fb7c3198296e9e79fdf120f3aca4b0d5c04fe3a2f4eeb944497b0a7708d88
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external resources, likely for phishing or malware distribution. The file's structure and detection signatures point towards a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/mHcMeCcfVl0/square?utm_term=yuan+to+philippine+peso
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e868e3883f7c6d03eb289e/1625843939890/multivariate_time_series_analysis_with_r_and_financial_applications.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee18eeab0cb8743be1b778/1626216686249/solid_pine_double_wardrobe_with_drawers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda60b5860d606f483346d/1626187275751/wemifolunukatofimudipe.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7d86d81ab8d1aa9deef1d/1625806957607/sketchbook_ideas_cover.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7c3ed687a3d659a4b00bd/1625801709614/the_relevance_of.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_off0000cc94.bin
b10b4b6a6335dff4dae84f4233c46156e7c6400c5c740f9abaed1e25c5488987		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC94 16324 bytes
font_01_sfnt_off0000f750.bin
76830da1758c105dc91cc53580c2b6ec2f63b074120621c28dac654ceb412c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 10332 bytes
font_02_sfnt_off00010e96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 16792 bytes

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