Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f48f187a4ff73e9…

MALICIOUS

PDF

182.7 KB Created: 2021-04-16 11:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64d4a6130f3ada280b02154553e3b41e SHA-1: 21eb82e78c7d7201e35e9c363c2f4418021b54de SHA-256: 7f48f187a4ff73e9864d4bca74a86d4fcd5b9bd9f4c912f0dc7a7c07f86b454f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'Mims drug handbook 2020'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nipisod.ru/strik?utm_term=mims+drug+handbook+2020
    • http://help-business-media.com/how_to_use_data_to_drive_instruction_in_kindergartent4sv5.pdf
    • http://werenntaq.online/27914906240j4daa.pdf
    • http://chambrehub.xyz/ag_cattle_reportbu9hs.pdf
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/048fd7b43360.pdf
    • http://ximikilanad.22web.org/cloze_notes_templates.pdf
    • http://rivubet.22web.org/cursive_letters_practice_sheets.pdf
    • http://save50it.pro/does_verizon_have_a_4g_flip_phoned5yem.pdf
    • http://lidzadva.xyz/tv_guide_brisbane_fetchp6ioe.pdf
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/6751586.pdf
    • http://nopejinon.iblogger.org/3864136550.pdf
    • http://rujakagixawimir.22web.org/quora_app_popup.pdf
    • http://gajozemexip.22web.org/zegalelugotogutumumaros.pdf
    • http://lg-copyright.com/callie_from_the_fosters8qj6p.pdf
    • http://consumer-data-protection-bureau.com/votinumozix4boaf.pdf
    • http://medyayazilimtr.com/the_book_called_thank_you_mr._falker1ckik.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xikisefux.epizy.com/canada_visa_checklist.pdf
    • http://witosef.rf.gd/jozerolufe.pdf
    • http://zulonojaminipe.rf.gd/guluporavaj.pdf
    • http://gebejofokim.rf.gd/irrigation_system_of_pakistan.pdf
    • http://kufitaxasatuze.rf.gd/bissell_proheat_2x_revolution_pet_brushes_not_spinning.pdf
    • http://pukunoganisopa.epizy.com/11897442251.pdf
    • http://dujibagakag.epizy.com/60884903579.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026cf4.bin
223568fc15723d408f00056d2cf6bf73ec0b5e81a44ab038b8d55cfaeb1c3c3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26CF4 1872 bytes
font_01_sfnt_off000275e7.bin
7b285193fb26a9d8444e43c6b323a5c81a2c987c9628ab2b89cacf7055335036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x275E7 5688 bytes
font_02_sfnt_off00028918.bin
0a8a17e7b1a09fb4008736bc955a470ccab0d03fb1ef33fe9197e738d37421cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28918 13156 bytes
font_03_sfnt_off0002b51f.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B51F 16060 bytes

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