Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0f4aae5a018582…

MALICIOUS

PDF

69.6 KB Created: 2020-11-23 15:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9538ee9b710bd8155370ef51a9f0f13c SHA-1: 73d59f291ed38e5ec81a67a728e15f82e911513c SHA-256: 3d0f4aae5a018582a86fc83072841c016b5b3bceb92ab4a40a9b03ac4a89ef7c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://traffine.ru/strik?utm_term=planeaciones+de+computacion+primaria
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5f99f44f135f3.pdf
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f9e022471009.pdf
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f93ee62f2d2e.pdf
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5f9f2b24a231f.pdf
    • https://cdn-cms.f-static.net/uploads/4454665/normal_5fa444299b9ad.pdf
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5f994c50a39d7.pdf
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5f88eeb898bf8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/49b83b27-4d92-4a52-a007-48933a905dda/ayatul_kursi_shia_full.pdf
    • https://uploads.strikinglycdn.com/files/29e9009f-d716-4873-b81a-64406d29bde6/matujesitebimobuzo.pdf
    • https://uploads.strikinglycdn.com/files/c03975a1-87b3-495d-be37-76fd0ea1a68b/dilemme_thique_soins_infirmiers_exe.pdf
    • https://s3.amazonaws.com/pezofut/80977169475.pdf
    • https://uploads.strikinglycdn.com/files/8a98034f-dd81-4988-a14c-d70a33f8b412/pokemon_uranium_full_game_download_for_android.pdf
    • https://uploads.strikinglycdn.com/files/62381733-3eed-403a-a041-0472c2e96c78/zapexinu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c50a.bin
8f7674cce483f6b2ae914e73257470c2b7272b330273e5c26953e29cd2675579
pdf-font-stream PDF embedded font (sfnt) at offset 0xC50A 5100 bytes
font_01_sfnt_off0000d63a.bin
1d5845ca9294b4526066f2aa578005b639738baef783e13826a80e5641200c44
pdf-font-stream PDF embedded font (sfnt) at offset 0xD63A 10952 bytes
font_02_sfnt_off0000fa0c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 4324 bytes