Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef1d42d1a4e8ee2…

MALICIOUS

PDF

62.4 KB Created: 2020-12-02 19:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 40e529a21dc2112d1291551dfc01da65 SHA-1: 21c1e951900bb37d2a0d436b17ace66c82a18922 SHA-256: 3ef1d42d1a4e8ee2169e7bd4d56a969ead293f31f1a44f6cc68876a04c77a226
96 Risk Score

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://traffset.ru/strik?utm_term=creating+a+dichotomous+key+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fae4d824f0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5f982d2d799fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5faf3c6263824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5f99c3afb8129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wajibile/62743301125.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2d8e3c02f22b9dd78a2b/1606299022775/chrystal_christmas_ornaments.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/canon_600d_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/pathfinder_kingmaker_witch_hunt_ambush.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/10176145198.pdfIn PDF document text
    • https://s3.amazonaws.com/bixumiburi/fifa_20_ultimate_team_app.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/japanese_wind_chimes_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/childhood_illnesses_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/arduino_uno_specification.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB910 5484 bytes
SHA-256: ef40d930ad0837b5037074128afc2e416aac91e802d5c2371f96cbac310da00b
font_01_sfnt_off0000cb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9F 9788 bytes
SHA-256: be46c456e667db6db0769cad362644ae3bfba64fb859e51c82a8aa2baf869bf1