Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6d7377fb03ca42…

MALICIOUS

PDF

64.3 KB Created: 2020-12-14 02:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3dbc57b3920fb8c21c555d54a61dbfac SHA-1: df61b1f0475cbff0d1c083624aea26fc9a46740c SHA-256: 1f6d7377fb03ca423f445fefd74e62ddf02d55fea10f9a7cabae729cccb3f8fa
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics and ClamAV as malicious. The document body, though heavily obfuscated, includes text related to a 'constitution quiz' and the authoring application 'wkhtmltopdf', suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

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://trafficel.ru/strik?utm_term=principles+of+the+constitution+quiz PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f9109899dbf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_5fb2decbb057c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416671/normal_5fbee16c6a252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5fa9c8aea514f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fd60fbb0b7ae.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/wejuvono/angaar_bengali_full_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/free_crystal_grid_templates.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5282fa04221c71171e00/1606374026994/29014146225.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fbb61c8c741314323605/t/5fc159edf81c9a2a0cd49426/1606506990328/the_way_things_work.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf55b1491241adc44ee45/1606219099881/colornote_apk_paid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34462ab79f442f238dc9b/t/5fcb157f1415195da07f93ee/1607144836630/care_bears_wish_upon_a_cloud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5da01bda9c57a97e01dc8/t/5fce6703e43f2b00a8de0772/1607362308017/azure_cloud_backup_storage_pricing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2c57848ba205d187778/t/5fc493dd7acac6192a531aa5/1606718430260/ma_h_mt_tri_mc_hng_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06933a25-3f66-4eef-99e1-439a1d41ac64/diagrama_esfuerzo_deformacion_del_acero.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_off0000beac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAC 5068 bytes
SHA-256: bf9134d5f04ebead134921512aa98c628005c1a653555f0b2b1d5079b1773301
font_01_sfnt_off0000cff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 11476 bytes
SHA-256: 676770adb2f9350ec88eba2c11f00152096f03cafc82f72c201ded4960110249

Open this report in the interactive analyzer, or submit your own file for analysis.