Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b23c9e0b645f344…

MALICIOUS

PDF

68.0 KB Created: 2020-11-11 23:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 02f7fa934184dc737bcb959093582983 SHA-1: dedcc512c08a585c42525d82d6f157644d5762d8 SHA-256: 3b23c9e0b645f344de9cbc6dd1b2f5056b15ccf96333f7f8445cba236dccdfd3
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 0.9997

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://trafftec.ru/strik?utm_term=configuring+dhcp+on+cisco+router PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5fa575dc3d9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_5fa8d1389aa5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427544/normal_5fa7e2e75913d.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/potot-kuvexejoxis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5f8979ce00179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5fa493d8dd5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5f9d4af900c39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a6a2e4-b50d-4178-8677-46ff7ba2e97c/47201260645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad752f95-b56a-4cbd-b9f9-63eda4ed9153/57313099460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffa16e7-3bca-40b4-a2de-3d77c1bb8ead/pilobej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d954cd8e-4e86-4a75-abde-cb053a3034e6/58546286041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a24ecfc-3c59-46eb-8ee4-964c8e8d1d1f/79631371192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f8593e-e376-4134-811a-aa7d44d75e15/enhanced_state_id_michigan_cost.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_off0000cdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 5080 bytes
SHA-256: fa5c16afa5909eef364d136d4e9099004c06b72144c6ddc917484ab6bde00dac
font_01_sfnt_off0000df22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 10668 bytes
SHA-256: 2cc7cf10dd504700629f538e5f4ff2ed9b0ace6999aac02a9e2668e90405c024

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