Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb051461360dfdc…

MALICIOUS

PDF

72.8 KB Created: 2020-12-31 06:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d02519737e1d406a2eea84a673d70cc9 SHA-1: e087ff325905edcf00f4c2eefe259ec4796be4ea SHA-256: 5fb051461360dfdc245fcbb8fbbb656dc319446cee39b7460f4e5044aa4a8f5c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document content is designed to trick users into believing there are new or changed bank instructions. An external URI pointing to 'trafficel.ru' was extracted, which is likely part of the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://trafficel.ru/strik?utm_term=account+balance+vs+available+balance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415929/normal_5f956dfbd8bfd.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/sjevvhb/need_for_speed_most_wanted_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/MiijgTl/fimalamimezuraseleninemer.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/JjcWiiC/world_conqueror_4_modern_war_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/ijgjbmn/retro_coffee_maker_white.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/UMKECC0/18472539520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_5fad453d296fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cf1fe1de-c95d-47d0-942b-e0007db9a72b/onkyo_tx-sr502_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39567522-d547-4c1d-b756-4dc2ab1aa94f/artisan_vegan_cheese_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6f3b18-6c33-4244-bf53-31b1a126c201/59362678426.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/president_trump_press_conference_3_20_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/lab_equipment_worksheet_word_search_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed7f56c-c17e-402c-b4bf-5fbd2e11c9be/empieza_translation_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0dd6135-4ae9-47c3-a33f-b8b83dee3cf5/kalavasupiroboder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3e6b72-98d6-4757-aeb6-62a962b653d2/net_sales_divided_by_average_total_assets_is_equal_to_the.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_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 4768 bytes
SHA-256: 33dbaaae9f539c07fbefc9c0f0584d4e98c17bb34396babd4eeffae5995b8d91
font_01_sfnt_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 10792 bytes
SHA-256: 6755371ffbaca0ac13c89623eab43968b34dc8766efb4215941936fdd68eed34
font_02_sfnt_off00010802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10802 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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