Malicious PDF — malware analysis report

Static analysis result for SHA-256 4682d40ccfd504d3…

MALICIOUS

PDF

63.3 KB Created: 2020-11-19 01:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 783b2201b6fb54511453f3e83b4eba37 SHA-1: 33af58033e8faa05cb050ca34eb09062b5d63b87 SHA-256: 4682d40ccfd504d3327c7e6838815cf2cb4401aae7b2717bc306b3dc56c2548e
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was flagged by a machine learning classifier and ClamAV as malicious, with ClamAV specifically identifying it as a phishing trojan. The presence of an external URI pointing to 'trafficel.ru' suggests an attempt to redirect the user to a malicious site or download a payload. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the phishing lure aspect, indicating a deceptive call-to-action within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=usmle+step+2+secrets+5th+edition+red PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444378/normal_5fb32f676ca18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f88a2786b340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fab36385168d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5fa2e9879376d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f88ae36c1f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5fb5762557a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_5fa892b035fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_5fb3efd7855e4.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/bomupi/new_bloomsday_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b49079-a72d-44d6-a204-e3d9c318c13a/85215924917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54f115c-35b3-4292-9c69-4b95cc09db0c/28503130604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217729e8-9d7a-4ede-ba93-5ac25dc57acb/despicable_me_unicorn_plush.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/aquaculture_biotechnology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f96e7f3-279f-471c-a54c-15272e7febad/kapabewapawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdef8b7a-a0df-4968-b4cc-26e31f5e70d7/pegekutunisezeged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89ecac4-f4bc-4e30-88f2-c98c325ae800/71118384988.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_off0000ba4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4F 5352 bytes
SHA-256: 354ce6935d4b06799d5801eff39111eed0de838ce99e2a01474a88a390397e6c
font_01_sfnt_off0000cc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC60 10548 bytes
SHA-256: e4060f55f11f7a43b1c26805a685fe7ba2d4f8d3bc56a484623740162a54ce8a

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