Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e696d1f91cafbb…

MALICIOUS

PDF

83.8 KB Created: 2021-03-03 19:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c01dec87009bdbf8ef3c4722243aec5d SHA-1: 23edab6181baee93693aded52102e6d5c28c8fc8 SHA-256: f5e696d1f91cafbb414420a3a278928ad5a130ac091e7742d7498682b9cd4839
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'dafemum.ru', likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to employee development plans, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=professional+development+plan+template+for+employees
    • http://miromawetibikew.mywebcommunity.org/how_to_use_a_bissell_ready_clean_powerbrush.pdf
    • http://kojijeku.mygamesonline.org/whirlpool_wdt720padm2_circulation_pump.pdf
    • http://ligumexijigab.getenjoyment.net/67724174521.pdf
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/b1a8f91e12918ae.pdf
    • http://nedopivele.22web.org/how_to_say_goodbye_in_latin_america.pdf
    • http://wirajamosilun.22web.org/suzoledidime.pdf
    • http://nenugatigubom.66ghz.com/vba_variable_as_worksheet_name.pdf
    • http://sujabupinoda.scienceontheweb.net/how_often_do_you_need_to_service_an_outboard_motor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/limepusotanal/accucal_screen_report.pdf
    • http://vesevujivodekut.epizy.com/windows_7_activator_exe_file_free.pdf
    • http://pikubub.onlinewebshop.net/zojubimapeduvexobajem.pdf
    • https://s3.amazonaws.com/purixifusipelid/browning_hi_power_mark_iii_review.pdf
    • http://kewetanetoza.atwebpages.com/10823037312.pdf
    • http://vepitejususas.atwebpages.com/naruborewinukopeji.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b70.bin
e9308b611dab6c4dfe795973d8ef7b587496ba85e9008e0e85c2db92ab623cef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B70 5352 bytes
font_01_sfnt_off00011d9c.bin
2f297b2f473d2164041eda2830f4bd5ac9dbb00d46f55b6e84eb9d3a60449899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9C 10616 bytes

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