Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf02231de05063b…

MALICIOUS

PDF

87.2 KB Created: 2021-07-13 20:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aafb26f111f1a762c7bb926b0f175a36 SHA-1: fb2088d1e3cf9af28461119150b70800f806770c SHA-256: 8cf02231de05063b03e6af1960638cd87a81126063a9bd3842aa45f71487eee4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URI pointing to a suspicious domain, identified by both ML classifiers and ClamAV as malicious. The presence of this external URI suggests an attempt to redirect the user to a potentially harmful site, consistent with phishing or malware delivery tactics. No scripts were extracted from this sample, but the embedded URI is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/square?utm_term=beyond+good+and+evil+meaning
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca437c32416487af28ca7/1626121271811/69188216592.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e928a48915684aa53d8ceb/1625893029020/13756792652.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8825b85cb33365879f216/1625850459165/67204717877.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8035c4b964f05b849b5d8/1625817948526/chapter_7_summary_their_eyes_were_watching_god.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8286a3e9df788e6d4cc4/1626112646113/75333901168.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edc408a9d1f62037e0019c/1626194952989/18085515494.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed95d9f90efc25ed73bdbc/1626183129510/mixed_wrestling_gifs.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9317b5fa2eb14b90c5d88/1625895291096/xosiruvofamifezejo.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_off0000f4a3.bin
c842102d651147e10bca9486b177d3657d579f8540a78f65dff7b7a67ae95a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 10460 bytes
font_01_sfnt_off00010c21.bin
645712406f527411981e50542346d8ad58c4f8de696cb671e56aff6d07262e79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C21 16732 bytes
font_02_sfnt_off00013744.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13744 16792 bytes

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