Malicious PDF — malware analysis report

Static analysis result for SHA-256 830dbacad367cce1…

MALICIOUS

PDF

75.9 KB Created: 2021-07-17 00:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22c34e25b5c95ed41c2e424dba806cde SHA-1: f1cc7bdf8471a90ad2a8b2a2b99f2e1ab8a35873 SHA-256: 830dbacad367cce1048bafc9713efcc4c3f68fea8bc0a2db8a229a3f7da704c2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which is flagged by heuristics as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted from this sample, limiting the ability to determine specific execution methods.

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/UZrB20b2Dcg/square?utm_term=weather+report+10+days
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f066acac785a4b5babf59a/1626367660209/lets_go_5th_edition_free_download.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f08bbd522e0e61e4e166e7/1626377150048/how_do_u_find_the_zeros_of_a_function.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7cd2288cf71862a8e16e/1626111186602/feeling_of_tight_band_around_stomach.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc927d6548a387fd0f5fe/1626196263490/70612470297.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecacb0e4ca3800a11bbcea/1626123440078/51156800502.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_off0000c93c.bin
f9c78167cb812512c062c29c88b46aa2909d6f2263a81ccb4d0988d29a30b9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC93C 16452 bytes
font_01_sfnt_off0000f3c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 16792 bytes
font_02_sfnt_off00010bdf.bin
0601f5e5a2de45f50923e7716d9d97e4ad635de532c227ead5d8109248d6e459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 10528 bytes

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