Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a3dff863bffbd8…

MALICIOUS

PDF

83.0 KB Created: 2020-11-18 01:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f66f05c0ffb94fd19ea960f1accfb398 SHA-1: da189db578164502e392efb247879af34e55e1d6 SHA-256: a3a3dff863bffbd82f3141bd5db33246b0013e87014cb411abf7f04ebcae277b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffnew.ru/strik?utm_term=heddon+lures+value PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5f8da9258cf69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5fb2e73ce98b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5fa23c261e471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_5fa4334e335e9.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/tadovu/xijepobik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3abb1b1-8070-4446-8d5c-246ccbeb6223/xorabuvazaxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e93c9c-8738-48a4-8e77-bf7b9c9ea01b/71462931430.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/fivapusozoromereva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8daa96c-6ad0-4b84-9ec2-30911b04dc66/29156522093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac1b9ac-7ae8-461c-b091-576a3c2d8682/fexonirune.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/curriculum_means.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_off00010954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 4840 bytes
SHA-256: a779518afdacb58ef214706cb77ab2c5a2af71ee323aebcfe711730a6ea3d124
font_01_sfnt_off000119d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D5 11188 bytes
SHA-256: 3e5968e7eee1b03865b31e7a4796a38201731d189000698321c67114010698ad

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