Malicious PDF — malware analysis report

Static analysis result for SHA-256 b381fc1e01712f48…

MALICIOUS

PDF

84.1 KB Created: 2021-07-17 04:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8eb918a966eea151cbf1e4a1765494d6 SHA-1: 9329c4af19ae945ee224fc23eb095ea609109234 SHA-256: b381fc1e01712f4864d13b4b9803d8e22c43970617ee799861aded18471fa9ff
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. The critical heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document attempts to trick the user into executing commands via the clipboard. This suggests the document's primary purpose is to facilitate the execution of a secondary payload, likely downloaded from one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/iCUEKX862tE/square?utm_term=acoustic+mass+spectrometry
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f03576e9d3bc6103001961/1626355062224/xowoxusojezaxizadu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e83603687a3d659a4fe160/1625830916052/vavobetopani.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f137e715846f0d14eb9b80/1626421224207/gasisow.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f198ee2333865e2868e41e/1626446062660/nfs_carbon_full_version_download.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7fd55c244202458b2074/1626111957772/warframe_how_to_trade_without_dojo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edfb20930ff80baa0f0f16/1626209056607/halftime_show_time.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee4a17a005482cc157366e/1626229271336/10760722140.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1c4114104a47a1bc41603/1626457105132/cheerleader_mp3_download_free.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0202f161c06605439960f/1626349615994/dynamic_system_examples.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7b52c217102653d546a5/1626110802294/79548252239.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f00653d77757041653fb3d/1626342995659/76870891665.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f11b3f4bb49071de191797/1626413887932/sebuvitawepepitoxukuvaxe.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f22e96b3909637de9a5d40/1626484375024/29795486720.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee646afc191471fc6ecbeb/1626236010253/alan_walker_faded_remix_mp3_song_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f21215d8f598715a85dfa9/1626477078178/hate_story_3_full_movie_watch_online.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee6422ab0cb8743be70b1c/1626235938461/sazogapewuxagowawupal.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_off0000e431.bin
c2ea415ad90b6834b2b4bf4fc14a0d9eba0578cf41b1fc284c2d854cd80c5f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 17280 bytes
font_01_sfnt_off000111da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 16792 bytes
font_02_sfnt_off000129f1.bin
fd7d701b91a20e27a5eb26898e2e1373ae0877c6242ac66bb1a0c9ee2550668a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129F1 10580 bytes

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