Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f1c6199600c7fa…

MALICIOUS

PDF

78.8 KB Created: 2021-07-17 18:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64b8f6b6b6b909b98965ab3d33fd2658 SHA-1: 189957d4a0482b69dcc8c561c93737d1c6fabfa6 SHA-256: 07f1c6199600c7fafcf5bce7f5f5fb621c93e321219649a7f0d29440631000ed
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a ClamAV signature and an ML classifier. It contains embedded URLs that, despite some being labeled as benign, suggest an attempt to redirect the user to external content. The PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8755

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/NsX9ihectO0/square?utm_term=the+short+prose+reader+13th+edition+pdf+download
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0c1f66e32095df97debf6/1626391030673/sex_with_pee.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec931d4f558d0bf39d0b21/1626116894073/bad_red_hair.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f273256167905317d18756/1626501925635/matrices_with_same_eigenvalues.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2c015deec5816202848ba/1626521621305/fortran_for_dummies.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e921ce27127e680415f875/1625891278209/95555458994.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9414e58c6623f038359e8/1625899342491/back_and_biceps_workout_with_dumbbells_and_barbell.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e84532a956a31f0d60fc39/1625834802731/formula_to_count_characters_in_a_cell.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_off0000d2de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DE 16792 bytes
font_01_sfnt_off0000eaf5.bin
31e840104b915ea28df611de13bfa9df2124f1a508d9a653dde2da2e01fa052e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 10868 bytes
font_02_sfnt_off0001042b.bin
a7a70f4f3cea3c4b13816937657e3c8b9a2a70571d9f5078226c773c472b42a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 16488 bytes

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