Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb20363aab3f015…

MALICIOUS

PDF

77.0 KB Created: 2021-03-31 09:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e4dd1f38462eedf5e2c02b88e7de89d SHA-1: aad7384e3d171e9f8bf511c87465aa2a4f2ad475 SHA-256: dbb20363aab3f01579a88f44bfb1d1c344b284eb7c013c59ca35a8e471a96fd8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'midufefew.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Bbc good food guide canapes', suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/123?utm_term=bbc+good+food+guide+canapes
    • https://cdn-cms.f-static.net/uploads/4500417/normal_6014eb10e456f.pdf
    • https://cdn.sqhk.co/gadowikuxe/oTLMjsD/edmentum_assessments_answer_key_algebra_2.pdf
    • https://cdn.sqhk.co/bujasugawo/ifDvhh1/cyberpunk_2077_camera_filter.pdf
    • https://cdn.sqhk.co/zulatobi/ahfxjjV/xipexexuvozo.pdf
    • https://cdn-cms.f-static.net/uploads/4368250/normal_604187ca08d41.pdf
    • https://cdn-cms.f-static.net/uploads/4455387/normal_602d83b8dd939.pdf
    • https://cdn.sqhk.co/zativojor/VjdVEjc/zebiwovunawanikobimabuke.pdf
    • https://cdn-cms.f-static.net/uploads/4422135/normal_6031362880e69.pdf
    • https://cdn.sqhk.co/kekotenonaxu/dJgcgg5/dragon_city_pc_games_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nonipesikiri/2020_calendar_design.pdf
    • https://s3.amazonaws.com/foneniz/dawatukefudedef.pdf
    • https://s3.amazonaws.com/wizuluworafid/najegipidinomez.pdf
    • https://uploads.strikinglycdn.com/files/61e11349-3c0d-4bdc-b6a9-37779e0d5c6e/bozobubaf.pdf
    • https://s3.amazonaws.com/lodazojamuva/6771002865.pdf
    • https://s3.amazonaws.com/lixasifasi/22930377417.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/78060793525.pdf
    • https://uploads.strikinglycdn.com/files/a9294dc8-5ff1-4829-84fc-413a1a4347f9/taking_sides_clashing_views_on_global_issues.pdf
    • https://s3.amazonaws.com/savifin/56258610733.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee94.bin
b8d994a9497c503ee5f0abcf97cd82d9d201935c0e0051fa1522792a5320ebad
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 5384 bytes
font_01_sfnt_off000100fc.bin
f0ecc5171c51d642c180eecc0315d0a8aced4a43cfa16ec07c5581652a3577b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 10904 bytes