Malicious PDF — malware analysis report

Static analysis result for SHA-256 750509a26f718b44…

MALICIOUS

PDF

76.6 KB Created: 2021-07-13 00:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b23f7b3040b0c69154ea46b7e2fe1552 SHA-1: 581dce0cbde50afd98790e0b37f054b95e5d819b SHA-256: 750509a26f718b44335f81ae223dbbf15313c56705335171afe91cb1e8273927
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no specific script was extracted, the presence of embedded URLs and the ML/ClamAV detections suggest an attempt to exploit the user through a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8791

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/razvivatel/yapz/~3/-MXWpcYQ7kA/square?utm_term=madhyamik+physical+science+question+answer
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b9ce23621b4743e2606c/1625799118561/83950270334.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e852a8ff5b651d083e1ce0/1625838248734/what_is_the_answer_called_to_a_division_problem.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca1a345711547b6a933c5/1626120611463/wikikaju.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e4dad1bf7105ccb4f3c/1626111565765/45016557441.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e847eab03fa808e5fe0b19/1625835498776/like_your_skechers_song.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_off0000c798.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 16792 bytes
font_01_sfnt_off0000dfaf.bin
a41de5ece6b075c32af0ccc25a63778a0c20240a4fafd0b853cce2c5c41029c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 11312 bytes
font_02_sfnt_off0000f9ec.bin
847a65723e5c3067bd1ff410fab7aa79cc6edbb84893d03402894169cba7cd68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 17016 bytes

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