Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db72a9b3b259fb9…

MALICIOUS

PDF

75.0 KB Created: 2021-03-23 02:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bdfc7309dd5f80f0c98464a9498ff64 SHA-1: d2401476ef1635a8fb56a91d36c86b5f5f57b9a7 SHA-256: 0db72a9b3b259fb9143fdc2d0c09f4781f9d4e32270bb00651a4f2f2a2466de6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to connecting audio-visual equipment, likely as a lure to direct the user to the embedded malicious URL. No scripts were extracted, but the presence of an external URI suggests the document is designed to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=how+to+connect+a+yamaha+soundbar+to+a+vizio+smart+tv
    • http://muwiduvepobuz.mygamesonline.org/54382239013.pdf
    • http://luchdobro.site/biography_book_report_for_3rd_gradelhjla.pdf
    • http://mokaxizekebade.scienceontheweb.net/fotidaxebe.pdf
    • http://lnstagramverifiedsbadgesforms.com/503183183221oqbj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zafebofegev.epizy.com/online_kaspersky_antivirus_free.pdf
    • http://bogibil.rf.gd/wwe_wrestlemania_results_bleacher_report.pdf
    • https://s3.amazonaws.com/xukirizugukugi/how_to_do_vertical_gardening.pdf
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_d52f0dffaebc4e3f8842fc25db29dc59.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d5fde206-04b5-4d62-aa1e-3b0b3e75ca45/flow_chart_template_word_doc.pdf
    • https://uploads.strikinglycdn.com/files/b5aa334e-6d72-4470-9bde-0e3dd2cf5325/how_can_i_play_a_mini_dv_tape.pdf
    • https://s3.amazonaws.com/zidenigad/27164428142.pdf
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_88818c9573e8474690939df633d5b2e1.pdf?index=true
    • https://s3.amazonaws.com/sefukirexuwekij/bloons_td_5_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/056fb4ad-ea17-45af-a260-874f9c8cc929/dazoteke.pdf
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_58775048e69d43d39247cc259c6ee0a4.pdf?index=true
    • https://s3.amazonaws.com/sefiwegegagu/77922281822.pdf
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_925d33b0cdf2445ab21423dfc8cfeada.pdf?index=true
    • 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_off0000e327.bin
b0ee514fe5ff87744af2fc2a0fcbbc78b2f5d577a6b220f829871ab81e297dfb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 5552 bytes
font_01_sfnt_off0000f5fa.bin
72de80f72f00774688978b6445d374e1ab0c829483dac44650d4a8d1c61dc985
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 11476 bytes