Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2fa4a092acd295…

MALICIOUS

PDF

81.9 KB Created: 2021-04-02 17:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f604f8b69031f276a96687134743935 SHA-1: 0da990e3ddead4108df9b7fbaa09c510d9f25c42 SHA-256: 2b2fa4a092acd295d508e66b9357854fc77ca4925ee5de32808d0c55bab33a84
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely serving as a lure for malicious activity. The document body, though heavily obfuscated, suggests a pretext related to 'Escuela de padres 2.0 blogspot', indicating a social engineering attempt to trick the user into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=escuela+de+padres+2.0+blogspot PDF link annotation
    • http://russianstravel.ru/goxibirupiropavqkp.pdfIn PDF document text
    • http://xxlmature.site/dodge_caliber_dash_lights_flickeringuofqg.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/xtQjfZq/masha_and_the_bear_toys_walmart_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/hbWgii3/2020_election_candidates_michigan.pdfIn PDF document text
    • http://3bureaureport.info/delonghi_magnifica_s_manual_troubleshooting38xg0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489846/normal_6034c653569fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_601800d00270b.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/ghxkKie/rofujebaremogunej.pdfIn PDF document text
    • http://goodxday.xyz/38516233931rt02o.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/sugowubuf/91641534508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12b8429-4376-4b90-a756-f3b4a344c919/31528418067.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/arris_modem_tg862_wps_button.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/whatsapp_for_windows_8_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/bengali_grammar_book_for_class_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0762ca68-aa46-4e46-b7f5-0621d609f96e/nijamefupiwuxarusu.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/89866078440.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/badlapur_movie_hdmoviespoint.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/aruba_315_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e940581-af9d-416f-a514-320af4e91309/95889535757.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/xumakejevisa.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/26_schwinn_sidewinder_womens_mountain_bike_silver_blue.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_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 5644 bytes
SHA-256: 51a2fed5097414f0cef844fc2f56f2a9336d060ebe04ef8383fa066d2b7ac5ab
font_01_sfnt_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 15972 bytes
SHA-256: 767a0b8d487bcaacee0782cb5d2e1a59e09aaefbd499352810b443f500828e76

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