Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23dca2e6dde8b72…

MALICIOUS

PDF

78.2 KB Created: 2021-03-23 02:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d8a7740153dba7dad60a046cfd1c0cf SHA-1: 59bd21a5c6c6368c612ced05634979f2c8d849d3 SHA-256: b23dca2e6dde8b726c5894f45cfda7ac0c61a270bfa338e4f743c1b952c0a096
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://seumenha.ru/strik?utm_term=roku+streaming+stick+3600r+walmart PDF link annotation
    • https://cdn.sqhk.co/gegojagakexu/hjiiXie/online_marketing_companies_for_small_businesses.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/0PRjhif/norolixerinixavitu.pdfIn PDF document text
    • http://vorgazme.com/thomas_calculus_12th_edition_chapter_14nplj9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_601e95bf4b4ff.pdfIn PDF document text
    • http://update-win20.online/minasiziruwemajuxejima5i140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_60062dc48aa76.pdfIn PDF document text
    • http://sallles.ru/dopizidajalikalw5u9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_601a09cd61225.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/sonutopexaramuf/3rd_grade_teacher_salary_after_probation_in_rajasthan_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b3ad14-9a26-4471-9cdd-81511ad78b6a/american_history_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/graphene_nanosheets_images.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/vekof.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/87231887368.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/tetaledilofimaki.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/harrisons_principles_of_internal_medicine_twentieth_edition_vol.1__vol.2.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/platform_bed_frame_under_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9200a451-adab-4d8a-862c-3cdfad83e769/20761121329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d6548b-4f3b-472f-b055-df0ac92e8d11/the_pigman_pig_hunter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b196d9e6-6147-4557-b109-5cf0d97a9d9d/fl_studio_12_mac_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f12010-11d5-40c0-83f2-d52be496b1f2/krk_rokit_8_g3_price_in_india.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_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 5744 bytes
SHA-256: 9966a91630eeb730aaf158d65b7a4e24d3efc0b0a02a34fce093dca9ad956836
font_01_sfnt_off000105d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 11064 bytes
SHA-256: 7001a2ee553ede53de672e67b935f5b090bf81c7f7f01ee72f37a25c81e7001e

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