Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ab0794c459232b…

MALICIOUS

PDF

77.8 KB Created: 2021-05-27 19:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 488ab83f06da8ef04624f0b4b7703cff SHA-1: 82baaa7cc437c7d188a66d24c65c93416e98ff62 SHA-256: e4ab0794c459232b28c36ef693157f37630d8a836de129836fdd63f417c161c4
104 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. It uses an urgency-based lure. 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 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/strik?utm_term=how+do+you+turn+on+closed+captioning+on+spectrum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491445/normal_5fe892164913f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373240/normal_5fde272e9d54e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468289/normal_603be21fb7bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_603bba383ef0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b617be-3019-48d1-8faf-92e509afa5a7/fem_boundary_conditions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1f7946-d1be-424a-886c-47c4379c9425/why_does_my_id_say_not_for_real_id_purposes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b5d665-13d9-45ec-af7f-6366fb538690/31531517276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdaa24b0-e6e2-40af-9984-f5680011e42f/exalted_2e_charm_cascades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd6184e-6bf9-4423-91be-f9639586260c/petit_nicolas_film_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee0872a-d0b7-41ac-b3e9-3378efbe320c/63658173186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c63e5e0-72e9-4cb0-85d7-9146e6bfb9a0/80380653223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d498a86-30dc-4eda-9e48-9e78fb63694d/watch_twilight_breaking_dawn_part_2_free_online_no_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bc1b3a-a226-4f39-afd4-78b2139100af/cub_cadet_rzt_50_kw_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c4ab46-055a-4cd1-b2bf-53de55a6b59f/36018052398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5677d556-800d-4c5b-95d3-73f82df0f4e6/89425808316.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_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 5548 bytes
SHA-256: c6f74322211f333dc12d6b1c620f13ebc0155205f173d804b0561f946d2bc759
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 10956 bytes
SHA-256: 2ed4961f258349527863833d8ddb93116681576d8ee356134c8cca4f08db5f7c

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