Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de48fc4846c74f6…

MALICIOUS

PDF

74.9 KB Created: 2021-04-03 09:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f06eb2277b0af6f02a70adeb4055dc1 SHA-1: dc582ce8ef7bc1a5bbc89b1a98ea0065e010e2ee SHA-256: 6de48fc4846c74f60eae05a29f22c39a23a7a97dce457bc6d5ccec5319aea6bc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. An external URI pointing to 'druttle.ru' was extracted, which is likely part of the phishing lure. While no scripts were directly extracted, the PDF structure and the presence of external URLs suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=ancient+egypt+pdf
    • https://static.s123-cdn-static.com/uploads/4467322/normal_5fec1284c34a3.pdf
    • https://cdn.sqhk.co/wajidafix/O5jcpij/zedge_free_ringtones_iphone_7.pdf
    • http://indital.space/mii_channel_theme_piano_sheet_musicrw6up.pdf
    • https://cdn.sqhk.co/zexukobesu/hfEL7Sg/12082022151.pdf
    • https://cdn.sqhk.co/wolonevavaru/Pz9hcid/nibawosawewifutilemi.pdf
    • https://cdn-cms.f-static.net/uploads/4470552/normal_60488c6a9fe06.pdf
    • http://granitmetrospecstroy.ru/linking_words_exercises_multiple_cho3j26d.pdf
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fde8aca0a34b.pdf
    • https://cdn.sqhk.co/letiludixo/gijibjf/97604696249.pdf
    • https://cdn.sqhk.co/modonasuje/anxlagg/datonelox.pdf
    • https://cdn-cms.f-static.net/uploads/4459166/normal_602d71e380fe8.pdf
    • https://cdn.sqhk.co/zopizote/qsVgguZ/free_app_creator_for_ios.pdf
    • https://cdn-cms.f-static.net/uploads/4390051/normal_603868f398078.pdf
    • https://cdn-cms.f-static.net/uploads/4421939/normal_6048359e46d9b.pdf
    • https://cdn.sqhk.co/womilepeba/bgLjYia/fernanfloo_geometry_dash_fingerdash.pdf
    • https://cdn.sqhk.co/vegubefeno/gggdmjd/21960786499.pdf
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fd66fc884ddc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zidenigad/kufasedewiwemowu.pdf
    • https://s3.amazonaws.com/bokexizometun/how_to_get_work_as_a_freelance_interior_designer.pdf
    • https://s3.amazonaws.com/bupaxomu/bach_s_prelude_in_c_major.pdf
    • https://s3.amazonaws.com/fumiposamisur/62510636803.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_off0000e85a.bin
7da8327da177e0a30f6241a76b9425cbabe87be97f67c91c1b531fbdaf173068
pdf-font-stream PDF embedded font (sfnt) at offset 0xE85A 4900 bytes
font_01_sfnt_off0000f934.bin
99491f0f4d0b60c76ba8584aaa471cfc1f69f5e572c8a4c4bfdb952d1a74393d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 10528 bytes