Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7872039a283ad6…

MALICIOUS

PDF

78.1 KB Created: 2021-03-19 11:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a93f763ecf6d194a38cc0024d1f27cc SHA-1: 535d23e89d41f42682aabf2f302249ac39fdb973 SHA-256: 2a7872039a283ad6f2c65e3eddfda8efc8341c24b1b2bc8adfe1942cdea6501d
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://zajinet.ru/wix?keyword=the+giver+chapter+11-13+questions+and+answers', which is likely a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to the URL's purported content, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=the+giver+chapter+11-13+questions+and+answers
    • http://zumewidife.mygamesonline.org/how_to_read_nutrition_labels_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4465707/normal_604118ae75bb2.pdf
    • http://dixixamada.iblogger.org/gupakenoravobilalo.pdf
    • http://zajakewezu.iblogger.org/taxazidofoxedo.pdf
    • http://zoguponuwuxoli.medianewsonline.com/68174724997.pdf
    • https://cdn-cms.f-static.net/uploads/4418972/normal_604fe7e83dfe9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xubifupi/80461098087.pdf
    • http://rutenodisekorin.rf.gd/zambia_revenue_authority_annual_report_2015.pdf
    • https://uploads.strikinglycdn.com/files/f14132ae-ff92-44b9-bb68-b10f856a352e/gujivav.pdf
    • http://tebuwujovu.rf.gd/system_analysis_and_design_lecture_notes_download.pdf
    • http://dowenoji.rf.gd/77901527186.pdf
    • https://uploads.strikinglycdn.com/files/174b5894-7bca-4c72-872c-a5dad07cdfeb/12123079552.pdf
    • https://uploads.strikinglycdn.com/files/efcaa37f-f499-4f94-80ae-675e601dd171/nordictrack_commercial_14.9_reviews.pdf
    • http://rubuvajaroxe.epizy.com/commandos_1_full_game.pdf
    • https://s3.amazonaws.com/mejifavo/5707261876.pdf
    • http://medelomozukomav.epizy.com/fedex_drop_off_box_omaha_ne.pdf
    • http://segigeserife.epizy.com/word_cookies_coffee_level_18_answers.pdf
    • https://s3.amazonaws.com/sudevejerifu/66272115499.pdf
    • https://uploads.strikinglycdn.com/files/06461c45-6b81-44b2-9ac6-b32f6c87a907/mogapupivukigemesijonezit.pdf
    • http://todojenosefotaz.epizy.com/vaxuvigutuxexowoxegogi.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_off0000f350.bin
6c9942722d5f1795bf756e7aba13b6ea395bcbe99322c1f3fb4ef8b7a179d017
pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 5780 bytes
font_01_sfnt_off00010715.bin
6e3aabfeab12ffc00adf2720e0f493b6edcb4c050afa3ca673d9f8125ddeec92
pdf-font-stream PDF embedded font (sfnt) at offset 0x10715 10620 bytes