Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b5e8c82b4c9e73…

MALICIOUS

PDF

80.4 KB Created: 2020-11-29 10:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bee91e22e8291a045414818b3dfc9136 SHA-1: 9de0c6df58d3bb37b83dcf3bc2c2399db3e6d301 SHA-256: 57b5e8c82b4c9e73dd1d32ed6cebf7ae6f450ea6565d43ea31e734ada3504d16
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 0.9996

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://trafffi.ru/123?utm_term=form+199+instructions+2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f8e375d49dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_5fb857fdc6865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fbb68907a0b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f8eaac87997b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8dfbc6b9875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5f9f2f275402d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f8969b390b13.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://s3.amazonaws.com/kotenu/75755449259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a2fb99-a607-4721-b6cd-ef1d95f39a3e/parolanezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095ef06f-f9df-4a02-87c3-ed7b0937445c/descargar_pasion_de_gavilanes_completa_mega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6213de-7119-40b6-a9f0-bbd29f5a5e19/1200_lexile_books_for_middle_schoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84d5a0a-da2d-4023-b26e-3280c2d079af/kibewejimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326a65cb-033c-4ff4-9375-d6b790a73b73/52095024758.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 5056 bytes
SHA-256: d078675f8ec6075febef3cfb92df2cbb1665629f474d52a1493c24d3addc7916
font_01_sfnt_off0000ec36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 10900 bytes
SHA-256: 80f0bcc49dbdf3dd5382e3f30c84227d47ed5f42736e439382fe1a3f8999e570
font_02_sfnt_off00011187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11187 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off0001264f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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