Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fd6b4b8015cb0a…

MALICIOUS

PDF

82.0 KB Created: 2021-07-16 14:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd76af2f4aa7ba147a3adb95275475a8 SHA-1: 1288fe6f8d8c7c3ceb7c0527d37b6095150e4f78 SHA-256: f1fd6b4b8015cb0a95b80424793b34c305efdf6da984b02d5df1b9bd3033c68b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URL that points to a seemingly benign Squarespace page, but the overall context suggests this is a lure for a phishing or credential harvesting operation. No scripts were extracted, but the presence of embedded URLs and the ML/ClamAV detections strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://feedproxy.google.com/~r/sq/ugae/~3/5Aj-mlxkUx8/square?utm_term=bengali+meaning+of+ward
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec71bca3e9df788e6b88b0/1626108348139/pericardial_effusion_life_expectancy.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0c86d21e37b5b0f3595f9/1626392685611/toastmasters_cc_manual.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e780db68910946625eae84/1625784539655/piwek.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8643bdd82073f6ff55ed/1626113603790/vixixisuwujopizawiz.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1130815846f0d14ea29cc/1626411784889/rudibojiliwoguwonumoket.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0531663eaac751f2692bb/1626362647067/famous_male_redhead_characters.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed89c1e255175820c252a2/1626180034124/past_perfect_tense_of_teach.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e93f98f107ff2467ea0061/1625898904869/vunejovuzinexonewi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8afd7a1add4dee203fb4/1626114813651/23160821443.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_off0000da7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 16792 bytes
font_01_sfnt_off0000f28d.bin
3882a95b85f254b5d389f4bbce7c94e86ce8a5a2a0afa63975ee73a53e5ee849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 19112 bytes
font_02_sfnt_off00012403.bin
9484f1a64fada6659d0b466097b73eb462bfb13a664ff6ddd24a64ce966123f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12403 10568 bytes

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