Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf02753e11931cdd…

MALICIOUS

PDF

90.9 KB Created: 2021-07-15 13:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0905f5caf60dbbad99af87ab726bcd37 SHA-1: 84264183b142dbf7ba2615f7d3a380d61b5f077e SHA-256: bf02753e11931cdde66e9e70e021338a2a78afe90a2f7b086ddf861c6a8de9ea
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, one of which is associated with a phishing lure, suggests a phishing attack pattern. While no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/EjZ5HCEZs_A/square?utm_term=good+place+to+download+roms
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca2aa7b14134336df9265/1626120874596/moxepunojusijeronetu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7e3fc7e45264421f90591/1625809916509/how_to_paint_like_the_old_masters_joseph_sheppard.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee55857d49fb55d62902b8/1626232197959/political_sociology_nature_and_scope.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edc859d6548a387fd0e18f/1626196057904/mejanugikejo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca9678c19ad4998dea383/1626122599430/kubudamof.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efc97997dca740078b9667/1626327418158/acknowledgement_for_biology_project_class_12.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda4c2a73a263c31e100e9/1626186946835/anthems_for_trinity_sunday.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7841c0dcbb4159dd80ebe/1625785372397/brain_parts_and_functions_worksheet.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f00e82d9659e278646a12e/1626345090712/online_linux_terminal_compiler.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed898adacdbe35d62b6871/1626179978599/92210468713.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee58696bb0602df2133801/1626232937185/benign_polyps_in_the_stomach.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edabec7c55557fb27e6cb1/1626188780529/biogeography_and_ecology.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efd2d53db90d3c356e20c5/1626329813575/lexogumota.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_off000100d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 16792 bytes
font_01_sfnt_off000118ee.bin
c61bd534dd6f02642c8393857395376910441be3f5c17c4a3277a0511150311c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 10708 bytes
font_02_sfnt_off0001319f.bin
c1957920292b77da50506506d17dae51bbfdbee00a478110ac5691f44c9296a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1319F 16932 bytes

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