Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a314ebf1f34fdb…

MALICIOUS

PDF

80.0 KB Created: 2021-07-14 02:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f7071a085bf837a6c14d90f0eca7c89 SHA-1: 1c0164cebd8bd9743365ef782df2324295fae132 SHA-256: 74a314ebf1f34fdbba84d9b146cd54721bf9a1b7f19114ee000432189581090f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to a malicious site or download a secondary payload. The obfuscated document body and the use of wkhtmltopdf for creation are common in phishing and malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/r_nBws6J8g8/square?utm_term=convert+5+foot+4+inches+to+cm
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7954fd54eb070824c803/1626110292424/kane_slow_chemical_mp3_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eced514616123fc5f46772/1626139985177/basic_knowledge_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7727e0a0d2c023bdbb8f4/1625780862100/nafojefido.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7ef79a3609a707bacedad/1625812857953/80615104919.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e95281566ded7d61ae1a92/1625903745805/pace_health_pedometer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c910eebddd6e48ed9d18/1625868560516/famutegire.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8cf26b166174ac2d6a216/1625870118768/weightlifting_comparison_chart.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee16b2462f394a1e3f355a/1626216114403/slay_all_day_traduction.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede59ce6792c2552bb96d7/1626203548989/48360559375.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9f17f90efc25ed748061/1626185495888/juzixijebixetavafugigixef.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c5041b22c82f862d1781/1625867524442/unarmed_fighting_style_5e.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8f5a69d4b6336147dd4c/1626115930255/71434112351.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecacb3e0914637f38ef39d/1626123443445/nazipolaxoxuzixiwug.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ee8b27127e6804137c07/1625878155544/official_language_proficiency.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_off0000d9e7.bin
67527d452760fe43ee45711a45f102e1b07bf42891e216749cb4e05d5b746dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 16004 bytes
font_01_sfnt_off0001031e.bin
7f9cf73178bd4ce7c355d575c9e510d6b88641fbfe5551562a474fed7ca23797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 10700 bytes
font_02_sfnt_off00011ba3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA3 16792 bytes

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