Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdf349d85281549…

MALICIOUS

PDF

76.4 KB Created: 2021-07-15 08:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbf5edf58e84e996d1d0c184837c962a SHA-1: b59afdc1b18fdfb7fbd26a1e381ef4d206d9c023 SHA-256: fcdf349d8528154981ca9cec47d76f182e87cf441b13e2d40e3c335b3bd8f899
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a PDF file. While the specific content of the PDF is obfuscated and unreadable, the presence of external URIs and the high-risk verdict suggest a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of the exact execution flow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/v-xubMviL4Y/square?utm_term=classification+of+inverters+pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94ce9defa333328abd552/1625902313822/hollow_knight_fifth_pantheon.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60efca180d8d0805bdb32240/1626327577018/wevasivadefanobaxo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efc9d9ec49181e3c0f4184/1626327513443/74033958162.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e9090919a9f87deb71da3a/1625884937318/36322792876.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e880a8dbc00a3535ad647a/1625850024291/cold_beet_salad_with_vinegar.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60efc9de3015c64070c7890b/1626327518150/quotes_about_jesus_being_the_light.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7c63a28bb5f4f51625811/1625802299042/peloponnese_ancient_greece_map.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78eec8b0d544b6d690d6/1626110190689/natigenireduzetapu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8a1fb3cf73c101f200566/1625858555853/satanokik.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_off0000cb3d.bin
3d2f2a84f79b0ddde168d66238932476ab4758023446235b8471e650dbcfac90
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3D 10708 bytes
font_01_sfnt_off0000e3f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 16792 bytes
font_02_sfnt_off0000fc0a.bin
81e653a55d59a5b1130b8426c27c541f8ba1f8123c91181d4c6b9bb8f13a90b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 16004 bytes