Malicious PDF — malware analysis report

Static analysis result for SHA-256 9070605b5c6fba99…

MALICIOUS

PDF

87.7 KB Created: 2021-07-14 02:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 680b92da8ca3300a6afc7b0bc3602a05 SHA-1: 1fabdbf0da4f35e66a1923be089c1edb4e01e3de SHA-256: 9070605b5c6fba99d6e699657976501469325894fa12dacabe53d217adc930c2
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 phishing or trojan threat. The embedded URLs suggest an attempt to redirect the user to malicious content. No scripts were extracted, but the PDF structure itself is indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/rCno-htTzZk/square?utm_term=swtor+pyrotech+guide
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee04b33be50f2c5db1b57e/1626211507847/calorie_counter_app_free_2020.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e1ed27127e68041263ea/1625874925591/whether_and_if_difference.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8d1a92b0f0e19af672d82/1625870762058/zinati.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e78cbe1873c46ac934c961/1625787582206/gumaporibi.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_off0000f4ca.bin
7f52481a4f4b9280d8d6aeff87f0a4af984bede15843e9ae088eceb1418f23a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 17080 bytes
font_01_sfnt_off0001214e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1214E 16792 bytes
font_02_sfnt_off00013965.bin
e16d987bf039644ae8f7be3ef76ca29a4b672fce7277395c7da8065fb6f64051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13965 10688 bytes

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