Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b4c8f8d3508fdd…

MALICIOUS

PDF

72.9 KB Created: 2020-11-13 03:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 83b477eded7ca78aa2a6d1195aee5c84 SHA-1: 1125dbe1f3d51c54f5f79704fff15b800d6f02c7 SHA-256: e3b4c8f8d3508fdd35bc3d3e6d23a32f714f2b3dad47ab74736d5ec83c3f4a42
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://traffnew.ru/123?utm_term=wow+cooking+guide+vanilla', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a deceptive theme related to a 'cooking guide'. No scripts were extracted, but the presence of a malicious URL and the overall detection profile strongly indicate a phishing attempt.

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/123?utm_term=wow+cooking+guide+vanilla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417817/normal_5f9bd221d81e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5f9b77b89ef3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fa8328d73e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_5f98d521c3646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fa84236cecbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_5f9e19054d0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_5fad7af77a109.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/viromibukoleliw/jessica_harder_sterling_co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdf5a76-81ee-4ff4-9cbc-4abba13a19b2/ratalajumewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6720f8e1-7497-4e4d-8540-0a0b5d5ba3df/93600236805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2748ea-4089-401b-a79b-f7a6987c6ffc/potadodan.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/arbitration_act_1940_bare_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dac53cc-151c-424e-8282-267f5c0ebc26/pibarenuporexoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a02fff7-6c77-464c-bc5e-8372ca5c544c/sasalubakitazes.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_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 5064 bytes
SHA-256: 0d8e3c7ae4cf6c9fe614bd88a37713d5354b55e81b0f14fffe06a782706beb40
font_01_sfnt_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 10648 bytes
SHA-256: 46b7ee94ee3e0bc5d30707fa15223532fa902285b144cab22760dd2e38238552

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