Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee2f5bc636dbc8b…

MALICIOUS

PDF

77.8 KB Created: 2021-05-29 23:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a4f7344f62ceaa1bcd2eba0491fbc7 SHA-1: d6f0bb7e1bd9904768d18d199a7db6a2da32675c SHA-256: bee2f5bc636dbc8b3316694dcd7705c166af5a62e541edbaa18e696f17a6ad60
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. It contains an embedded URL pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'dbt worksheets for youth'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/strik?utm_term=dbt+worksheets+for+youth+pdf
    • https://cdn-cms.f-static.net/uploads/4408976/normal_605a361438d22.pdf
    • https://cdn-cms.f-static.net/uploads/4472221/normal_604a2ca73b500.pdf
    • https://cdn-cms.f-static.net/uploads/4471958/normal_6063fe9fd206c.pdf
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5fdc19fb55a66.pdf
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5fcf46587a388.pdf
    • https://cdn-cms.f-static.net/uploads/4447914/normal_6045ebab557ce.pdf
    • https://cdn-cms.f-static.net/uploads/4381294/normal_6063ecbbc3b46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/833347ad-4ccc-4346-a330-28471c4ad2fa/god_in_the_dock_lewis.pdf
    • https://uploads.strikinglycdn.com/files/1ff7db10-95dc-49a9-85e6-3a18f88e92b4/nuzekotosasu.pdf
    • https://uploads.strikinglycdn.com/files/06243f18-e945-443f-89b6-78d712a04bba/zobafemi.pdf
    • https://uploads.strikinglycdn.com/files/f6511632-3d2b-4a7f-a50d-c333f47fbae9/can_you_download_games_on_ti_84_plus.pdf
    • https://uploads.strikinglycdn.com/files/26daa633-fecb-40ce-be84-cb5b0aae56ee/infinity_gauntlet_foam_template.pdf
    • https://uploads.strikinglycdn.com/files/f03fc6bf-dc4d-4e45-b352-1c7b2e52b641/manual_chery_face_portugus.pdf
    • https://uploads.strikinglycdn.com/files/66e49d9c-339d-4029-a27f-75d9e79b9167/73396507117.pdf
    • https://uploads.strikinglycdn.com/files/dd92a1d1-4635-4d23-b83d-1dc9d9938c54/gabawitakaguz.pdf
    • https://uploads.strikinglycdn.com/files/d5123eda-490a-4df7-ad65-0f920d71c898/taletoraruvo.pdf
    • https://uploads.strikinglycdn.com/files/45148610-f204-4cf8-86be-f9b6867ad889/how_to_make_my_exercise_bike_seat_more_comfortable.pdf
    • https://uploads.strikinglycdn.com/files/800a9fd4-8009-444f-b1fb-995b1ddbcce3/45888660932.pdf
    • https://uploads.strikinglycdn.com/files/2e65e51c-9433-404c-9b31-e5dce7693289/kipulunosigajemavefegagit.pdf
    • https://uploads.strikinglycdn.com/files/4ec001a9-8576-4f5c-9e58-849440334079/gitolenamekorajofinuxamo.pdf
    • https://uploads.strikinglycdn.com/files/f2b0a2c4-f7bc-43f2-9c78-4dd8bd313f03/vikexowilopi.pdf
    • https://uploads.strikinglycdn.com/files/ff7a2166-5716-4e85-b0cc-9b441e03bd2b/58904764303.pdf
    • https://uploads.strikinglycdn.com/files/2f6a24ca-5fbf-4528-9570-266102e17654/powelo.pdf
    • https://uploads.strikinglycdn.com/files/85242324-c512-462f-b228-03146c7e9210/1239969612.pdf
    • https://uploads.strikinglycdn.com/files/3a8c564d-a199-4192-a044-718cfa26614e/33087680287.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca5.bin
663b32f42799677a43de6de50f93baf4df75bb99560d4d33e8a5ad798b68b2ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA5 5284 bytes
font_01_sfnt_off0000eeb4.bin
46b27edad47ba415896106ee3c12412fed038e8ce81279a15b58e222c7b0e0ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 11228 bytes
font_02_sfnt_off000114c1.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 16060 bytes