Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2cd4ee2c6596ee…

MALICIOUS

PDF

77.0 KB Created: 2021-07-18 13:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d44a54cc8d8eacd31ab6e3b6262e7732 SHA-1: f8ccc159f5ff964a96e12a4d8e04b5d19e01a272 SHA-256: 5f2cd4ee2c6596ee9aeb4677d0169a65db0f9f33f558af305556c2db6552e29a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0', indicating a phishing attempt. The presence of multiple embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to malicious content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=science+projects+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee452007d0587a3763979a/1626228001019/class_12_business_studies_chapter_1.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f15a87d1fa142bceb1e4b6/1626430087443/99085796213.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7d6931b0b43e07e629cf/1626111337729/nubalukamasanudekuxesob.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8c8eeaa19e084bc206c9/1626180750329/the_purpose_of_personal_letter.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e919068ce0e10532d27f5e/1625889030364/79678844692.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e87adc2b9a2c68788d662a/1625848540720/system_analysis_design_test_questions_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3e755aba5f52989ae68a4/1626597205470/200_pounds_beauty_full_movie_malay_subtitles.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7aab7e2b6271615a8636/1626110636036/types_of_subsoil.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_off0000cbdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDB 16792 bytes
font_01_sfnt_off0000e3f2.bin
50ac767492f7517e71b73cb0ecabe9ca34ef663b8c1def4d0e4fecb30f1afe6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 10608 bytes
font_02_sfnt_off0000fc38.bin
e62d0de0bd070e24c25b966cd1626f410aaef578a8191f3a83eba61ce4e884ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 16404 bytes