Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4bef338b79b10f…

MALICIOUS

PDF

93.5 KB Created: 2021-07-18 04:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 891095075a75ccd8274dd0d2d586c818 SHA-1: 99138e715f65e3d7760272fc8237868461612a9c SHA-256: 6b4bef338b79b10fc7d63156b42361b54dd959912263748b5a88eebba745b927
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing attempt to redirect the user to a malicious site. The PDF structure and embedded content suggest an attempt to disguise malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/iCUEKX862tE/square?utm_term=reflections+and+translations+take+home+quiz+answers
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec995d3631fd4ab8182693/1626118493428/jeff_booth_the_price_of_tomorrow.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f053e81c7a8b159d55f885/1626362856967/pegomowezor.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e880a2609a93167f91b05d/1625850018353/how_to_make_a_secret_room_in_minecraft_with_redstone.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92a802f3c4128e18aa3de/1625893504487/86244698222.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f32a63783e880aac7dd6a9/1626548835807/hr_policy_manual_in_india.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8a9680f4fe1319d15b633/1625860456185/is_xr_better_than_8_plus.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e80a7b28bb5f4f516551e7/1625819771164/the_breaker_new_waves_scan.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f185198bcf896c91633994/1626440985251/introduction_to_corporate_accounting.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1261a9014c44c5290077a/1626416666921/44943395610.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9415573bc4731c88ae64/1626182677667/88887927643.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f170e89b6f23611959c8b3/1626435816896/the_forest_tips_and_tricks_2020.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f181643d214e0c0785829d/1626440036566/tamil_old_god_songs.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f146c0c825a553dff62c78/1626425024909/82523362746.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_off000106cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 16792 bytes
font_01_sfnt_off00011ee6.bin
3aba412b62dbcc91cc39ec29d343116386df13cc721f26a868e28978e25dc3ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE6 11272 bytes
font_02_sfnt_off0001390d.bin
fdd52baf58e9a8ceff36040b0fd9d387bea62cf1e411800e458a61331bec6768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1390D 17528 bytes

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