Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a720f5a02fae39…

MALICIOUS

PDF

83.5 KB Created: 2021-02-11 15:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 80db736debcf971e294449a0cc504930 SHA-1: 9d3531c3ab81a685d67183c8ad9eac9c3a95375a SHA-256: 82a720f5a02fae39858bc98c549ab1e4dc1031dc574e93c9eb178b512b911468
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a crafted document. The primary malicious indicator is the embedded URL pointing to 'baarspo.ru', which is likely used to host a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=la+bella+durmiente+disney PDF link annotation
    • http://busawilapuguzas.iblogger.org/apna_time_aayega_full_song_pagalworld.pdfIn PDF document text
    • http://idealslim-ordina.site/necronomicon_hp_lovecraft_english0ypqy.pdfIn PDF document text
    • http://kezivinu.iblogger.org/fesaminopojopa.pdfIn PDF document text
    • http://groby-ritual.online/mixotobebobixufutlplqu.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/duvexetiloxafogefo.pdfIn PDF document text
    • http://requiremcgood.com/5834721020z8whg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/musokejixami/80784851737.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/assets_and_liabilities_statement_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/wanisuvikuxenikekuv.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/butewizadudujegon.pdfIn PDF document text
    • http://fosisidevafepet.epizy.com/daxipiretowifaxowemagol.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/nikobidubamapukud.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/16423735752.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/how_to_justification_report_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/battle_brothers_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/morella_edgar_allan_poe_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/biturakobalerir.pdfIn PDF document text
    • http://katewamopexo.rf.gd/wedding_flyer_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/anastasia_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/android_dns_cache_timeout.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 3700 bytes
SHA-256: c9879a1b64e7912e95631c7827d5696182b0d64d5c8f6b9a5bdf9b9d8a0989bb
font_01_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 5156 bytes
SHA-256: ae685373522e57b4831b17e59c40b21c53eac558a4d267e54c16e90fc0f39521
font_02_sfnt_off00011a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0B 11304 bytes
SHA-256: 1ca8a9de9eb5d6f3ab7272a18e9b9c99b7c3d3f2a3d9f2f0da8cde591a15597a

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