Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50127fb3730f650…

MALICIOUS

PDF

84.0 KB Created: 2021-07-16 10:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ff10dc0d6bdc2ce4bfdd182d0ffe683 SHA-1: 69fc2748a0b2f81ae6d1ecaad49f3bceec7bb713 SHA-256: b50127fb3730f65062bf064d711f33cd0943a6c99f88ebffbb501f21784f8785
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers also flagged it as malicious. An embedded URL was found, which is a common tactic for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest malicious intent, likely related to phishing or downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/~3/4aHNpQc2m6I/square?utm_term=imperial+delivery+bdo+reset
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8e1ca17c7f1bf005757f/1626181148467/81808801927.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8a840171439398e0bd046/1625860160394/7048914600.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f121b7c699444e2e41a988/1626415543460/dividing_3_digit_by_1_digit_numbers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f094cfda74272cec9ea4ed/1626379471435/mobaturojijazisotiluzeno.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_off0000e804.bin
97ab3ba9d48b1b80847cc162d42d7996014990b08b0f0882f33fffa3a35abf1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 16788 bytes
font_01_sfnt_off000113e2.bin
f6ce15facebc604240fdbb5e39d094da3207fd18fd7e44773c100cc41da377cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113E2 10720 bytes
font_02_sfnt_off00012c43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C43 16792 bytes

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