Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3d590d2ea80936…

MALICIOUS

PDF

75.0 KB Created: 2021-03-25 09:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 024fc7ae09ec771af1257891cb1219a0 SHA-1: e167dde0819a9c5b133334b5b60828e9e93e1a80 SHA-256: 6b3d590d2ea809363f07faca5da9a5a35eddd17b5724aec02ad388b9a4ade160
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'golowaki.ru', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, consistent with phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/wix?keyword=united+states+history+since+1877+textbook+answers
    • http://ruxenawuxovogu.getenjoyment.net/smile_bomb_english_mp3.pdf
    • http://xejepurefe.scienceontheweb.net/gg_1111_physical_geology_lab_manual_answers.pdf
    • http://lenulari.mypressonline.com/88698832053.pdf
    • http://fekowepiz.mywebcommunity.org/how_to_play_yiruma_river_flows_in_you_piano_tutorial.pdf
    • http://ramedefinu.getenjoyment.net/amazing_grace_my_chains_are_gone_free_sheet_music.pdf
    • http://nitiwomifigurod.mygamesonline.org/textos_apocrifos_de_la_biblia.pdf
    • http://zofunubesosena.mypressonline.com/border_design_for_a4_size_paper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jejulurowev/xepafosiju.pdf
    • http://nofolimuri.myartsonline.com/pdf_to_word_converter_software_freeware.pdf
    • https://s3.amazonaws.com/xirixepo/xofid.pdf
    • https://s3.amazonaws.com/gonima/yatesville_lake_fishing_report_2018.pdf
    • https://s3.amazonaws.com/rodakarugupoko/fundamentals_of_interactive_computer_graphics.pdf
    • http://dulanorelowekat.epizy.com/11th_arthashastra_book.pdf
    • https://s3.amazonaws.com/kosamupim/free_complaint_form_template_word.pdf
    • https://s3.amazonaws.com/baxunaf/metroid_2_remake.pdf
    • https://s3.amazonaws.com/roxawo/klasifikasi_bronkiektasis.pdf
    • http://bituwevemexeku.rf.gd/apache_server_configuration_in_linux_step_by_step.pdf
    • http://pozirumine.epizy.com/how_to_print_your_own_art_prints_at_home.pdf
    • https://s3.amazonaws.com/sefabe/94039865510.pdf
    • https://s3.amazonaws.com/wiwuxot/81638318347.pdf
    • https://s3.amazonaws.com/jumedemimo/bhagat_singh_story_in_english.pdf
    • https://s3.amazonaws.com/pajeriramal/fractura_de_cadera_anatomia.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_off0000e648.bin
25239d00ae51d20648c1077ad27d8fa7347ab024a58b7ee594eb55fa838a5784		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 5780 bytes
font_01_sfnt_off0000fa1a.bin
10067e925c1471df99a71803c308e4f93534d32a97862a69862f6b44c24d8ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10548 bytes

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