Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b2633024fb20fe…

MALICIOUS

PDF

77.3 KB Created: 2021-03-11 15:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e3740464d23027a9054edffd842c0b8 SHA-1: b513930f0d8d53f36d91253c6e064282b1228f5d SHA-256: 71b2633024fb20fec69659b157734da3f67a7cc69d160e5be1f4fd93c34eafeb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://pelibifir.ru/award?keyword=basic+engineering+drawing+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379851/normal_6036b2490e2a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483089/normal_6037480392e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_60392562d8c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_60290a458059f.pdfIn PDF document text
    • https://cdn.sqhk.co/fonixoligem/E9whc95/amazon_assistant_manager_interview_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_601ef5b036d63.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/pYjbgdp/super_zig_zag_world_record.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/reRjehd/monster_truck_xtreme_offroad_stunts_4x4_racing_kit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/international_phonetic_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/xawunaliginin.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/sharad_upadhye_rashichakra_book_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f337fa-4983-4ffa-94fa-3f0d372207b3/estndares_y_expectativas_de_matemticas_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f963b36c-2c9b-4ec3-9d1b-4953a61de9ed/modern_political_thought_readings_from_machiavelli_to_nietzsche_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f46b0e-a1b3-40fd-be61-870a191d30d9/victorious_woman_warrior_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de05e2-be5c-4093-8af4-4aeb850cc5a6/babigojuraga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b7c078-c2ed-46d5-bf1e-e278c00f2963/playing_the_ukulele_for_beginners_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe846d5-c875-4511-81b6-847cf77e28e7/11672705390.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_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 5636 bytes
SHA-256: ef9dd925b9158a44df4d24d11c43a44d9730299a0e03efdb4e26423693721cc1
font_01_sfnt_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 10568 bytes
SHA-256: 542b22cd1f7213fb9b67132b02e5db8fb0bdce9f12fb9a5e98aae796d908a16c
font_02_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 3632 bytes
SHA-256: 12939217f908c2d372150ee99b305bf9be24315871d4a68ff6866a98e17361b3

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