Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8705e80fb70eaa9…

MALICIOUS

PDF

84.8 KB Created: 2021-04-22 11:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c4a263b8a6dc9aafcc3d207759d68b8 SHA-1: 2d9e4052fb04af3230dbbb24a1cb2838f069025b SHA-256: b8705e80fb70eaa9713cff0b2bf80b09aa81ca2159e27ab9c7e37c8eb5bb3f99
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though partially corrupted, suggests a lure related to 'D-link dir-615 technical specs'. The primary IOC is an external URI pointing to 'seumenha.ru', which is likely part of the phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://seumenha.ru/strik?utm_term=d-link+dir-615+technical+specs
    • http://gasomenuza.iblogger.org/vekozonavomijer.pdf
    • http://jipujitematane.iblogger.org/judipanifujirad.pdf
    • http://wagumoba.iblogger.org/meaning_of_language_development.pdf
    • https://cdn.sqhk.co/veladaxuzeba/2icgigi/65860399115.pdf
    • http://wofefudolojet.mywebcommunity.org/ascribed_and_achieved_status.pdf
    • https://cdn.sqhk.co/fagaxirupunu/gehcjhg/top_trending_hashtags_instagram_today.pdf
    • http://rejawulomov.mywebcommunity.org/csi_algebra_solving_equations_answer_key.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/84f5e941-81df-401a-8ba5-20bf92dec90a/26838265689.pdf
    • https://s3.amazonaws.com/rizezobabub/adobe_reader_9_mac.pdf
    • https://uploads.strikinglycdn.com/files/034125f1-5044-4630-9395-ff3ff4a75e9b/buvifomakozurevufefoxumok.pdf
    • http://lozufifeme.epizy.com/ferixitul.pdf
    • https://s3.amazonaws.com/somamere/c_programming_lab_manual_jntu.pdf
    • https://s3.amazonaws.com/jebokizez/how_to_remove_a_thermostatic_mixing_valve.pdf
    • https://uploads.strikinglycdn.com/files/b7b31a6a-33dc-454c-b7d8-81bc6ec33592/who_is_the_clockwork_princess.pdf
    • https://uploads.strikinglycdn.com/files/346e242a-a550-4bf0-94f2-5bf6d3427ad9/55263065722.pdf
    • http://gafevudivexer.rf.gd/jotun_hardtop_flexi_safety_data_sheet.pdf
    • https://uploads.strikinglycdn.com/files/4861b8be-3e2d-4247-8af8-2b8b5df71266/nexemadowopeputonak.pdf
    • http://vabizofolimise.epizy.com/zojeraxumej.pdf
    • http://gogujigasad.onlinewebshop.net/how_to_get_your_permit_nyc.pdf
    • http://pimobepetokonud.myartsonline.com/california_consumer_privacy_act.pdf
    • https://s3.amazonaws.com/muvevanepen/javelin_validation_board_template.pdf
    • http://nufiwimuzobo.onlinewebshop.net/does_the_5th_wave_movie_have_a_sequel.pdf
    • http://gatataja.rf.gd/watch_twilight_eclipse_full_movie_online_free_streaming.pdf
    • http://sisawujeza.rf.gd/22167797714.pdf
    • https://s3.amazonaws.com/vezumobigodub/bibliography_format_for_electronic_sources.pdf
    • http://jexesixikagudix.epizy.com/where_is_the_histogram_chart_in_excel_2013.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f626.bin
75f0bd8c84589b6e04bad15ad44ed0316678ed184d9e1533e78662788da8caea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 5584 bytes
font_01_sfnt_off00010933.bin
59e48cf87d08eeb138ecb813305d2794d3d4e9c1bcb65c0a34d3d89f6efb1334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10933 10856 bytes
font_02_sfnt_off00012e7a.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7A 16164 bytes

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