Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a7f5c69199756f…

MALICIOUS

PDF

91.3 KB Created: 2021-07-22 05:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f971b03e1ecf0a30ab56e02417d946a4 SHA-1: 75bd473c465ec349580ce9b459d1c49e06aa0054 SHA-256: 32a7f5c69199756f19c9c749fb18bbc4618c9e828144f0961f393921882c57a1
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 embedded URL, https://krisoc.ru/square?utm_term=harry+potter+and+the+4, is the primary indicator of a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit PDF vulnerabilities or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://krisoc.ru/square?utm_term=harry+potter+and+the+4
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee62f41cf0e6777f30de70/1626235636807/42082134806.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f89d0ce4dd7f06555f9ee8/1626905869156/its_been_a_long_time_since_i_saw_you_my_friend.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0b1a1fcdff1298e4e9e66/1626386850022/juxosokiwumusezowitum.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f44b00668793736d3abd41/1626622720353/narume.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec94347a6a1626764a025c/1626117173514/superior_metal_structures_kinston_nc.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f58fc0d9389f5e80a942ed/1626705857094/birthday_message_for_late_sister.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f527e4668793736d4713b1/1626679269065/28525177180.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f020e491893d3c03972d13/1626349797159/berifutil.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f8b0e04d80571ef0eff8bc/1626910944969/what_is_swabi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8c832d6a22c495fc93bd6/1626916915138/pefozuxetetufed.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f548bd1ad9bf1c32cb32c2/1626687677568/12_levers_of_success.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5ba9bb85ab7f02bee1f3/1626233769471/12480690488.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7f0c49ebc0053f317445f/1625813188855/jemiwavopamabor.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4c1b4d68f32259069ff2a/1626653108248/17mm_to_cm.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f21892ec23251fe3c0cfee/1626478738176/easy_stencil_drawing.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0feb9e75c7a046d9aa7cb/1626406585907/pugopibigazonoketeweti.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f7ec6638b1e25ea6e2ac59/1626860646648/minimum_wage_for_24_year_old.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f03f5ac00d13116b47bec7/1626357594513/jadomuxorekupadekiw.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8bfb1996685841a9394a/1626115067882/the_most_beautiful_thing_bruno_major_guitar_chords.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f52979c5d9e6782cf704d1/1626679673410/amitriptyline_for_muscle_spasm.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c5437d3b385c94b49426/1625802051299/sokeximuxevolabutiganobil.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_off00010208.bin
787ea70a5c9688f4eed8dd65fc9636232f244ecdc979a1d9ee5cde27d748f0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 17812 bytes
font_01_sfnt_off00013086.bin
a71e94c58494bb84107f12d95506b02ed120c08290ec4570a95b73e87458b8c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13086 10368 bytes
font_02_sfnt_off000147e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147E3 16792 bytes

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