Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73e7a731ea4c1fd…

MALICIOUS

PDF

71.8 KB Created: 2021-02-27 07:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d9214476bbc47343c553d3da6fde4195 SHA-1: f1297c714b9f4f72bc3fa28c66f7637fb93bc802 SHA-256: f73e7a731ea4c1fdc2a54b4e3775a7e13412eda46342db7fdd615ed0be497cb7
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 embedded URL that directs users to a site offering an "audiobook" download, which is a common lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=nonviolent+communication+rosenberg+audiobook PDF link annotation
    • https://cdn.sqhk.co/puvubuzu/bWibagj/dining_room_sets_cheap.pdfIn PDF document text
    • http://mebel-albero.ru/balivimewivrge0d.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/eMvjghj/heart_background_free_vector_download.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/libros_apocrifos_enoc.pdfIn PDF document text
    • http://senteber.site/81759677105uilj7.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/nasawofotupidawobebilek.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/how_to_create_a_cost_comparison_chart_in_excel.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/craig_jukebox_bluetooth_speaker_system_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ig6jdhh/rotator_cuff_injury_test_youtube.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/minn_kota_battery_charger_lithium.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwuwijagabote.myartsonline.com/arifureta_light_novel_volume_11_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/agency_fb_fonts.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/wodovifimozapax.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/worelenagififunulesusenaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/nozudatasitaramaraguv.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/10213394547.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/adjective_worksheet_for_grade_6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 5492 bytes
SHA-256: 8268983620858ceb528897ac6165be6c5f3c441bf5399deea4b86471aba3f4e0
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 10380 bytes
SHA-256: 9a3624de1b8dcb82998745b89f939e92322fb44aa1f407c31a0085bd69cff4e3

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