Malicious PDF — malware analysis report

Static analysis result for SHA-256 16fe1b2ebc8e0685…

MALICIOUS

PDF

81.4 KB Created: 2021-03-17 19:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c817e07df63fb39c6a7a52ff517447 SHA-1: a380dd6ae916e3584809d7cb38425590caf09cd4 SHA-256: 16fe1b2ebc8e0685045a547a2467cb1fa094a85b783514e9442def75f1448a92
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure related to a specific name, likely to trick the user into clicking the embedded URL.

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://soxebez.ru/wix?keyword=claudia+martinez+reardon
    • http://gitamoravazini.22web.org/basic_geometry_worksheets_grade_7.pdf
    • https://cdn.sqhk.co/napotani/pijhcig/34237914058.pdf
    • https://cdn.sqhk.co/gabadifofibo/heygeWX/sms_ringtone_2020_download_mp3.pdf
    • http://fesabip.iblogger.org/jezidokipolotikexu.pdf
    • http://excellent-spb.ru/301330053923bi4g.pdf
    • http://bachanalytics.com/folosiziwilutadakeqgb6j.pdf
    • http://bluebadge-support.com/hachi_hachi_japanese_express_loves_park_ilh5q5d.pdf
    • https://cdn.sqhk.co/buxotulato/gojhheq/temple_run_oz_ios_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_a80841e043394f5ab3a4058cf09180fe.pdf?index=true
    • http://zivumimilalak.rf.gd/inference_context_clues_worksheets.pdf
    • http://sidukumu.epizy.com/93772008765.pdf
    • https://s3.amazonaws.com/widetunipet/forms_needed_for_k1_adjustment_of_status.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_5e14b78101e04b52b4873840f0941514.pdf?index=true
    • http://tosakiviga.rf.gd/love_of_my_life_sheet_music.pdf
    • http://jenesigafepi.epizy.com/sql_injection_tutorial_step_by_step.pdf
    • http://gigisijopa.epizy.com/86376752685.pdf
    • https://s3.amazonaws.com/zafaronivaj/acrobat_reader_pc.pdf
    • https://s3.amazonaws.com/lekelepowo/94644661624.pdf
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_4db0c39e2862406f876f9903e5a3b4ac.pdf?index=true
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_aa925c1db2c9498a8f442fd98fdf6898.pdf?index=true
    • 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_off0001017c.bin
6970c59dd49b01effd41fe811e1bd8937fb466268cc131b04b728e3ec48feb88
pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 4748 bytes
font_01_sfnt_off00011188.bin
3920c8722ec33f4fe4202cc7347c35240689c50d68e0eb9baa57c6dae44dec33
pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 11044 bytes