Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad766224e9eabf0…

MALICIOUS

PDF

80.5 KB Created: 2020-12-28 09:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 705dbf30c62821e37825e2150dd1a786 SHA-1: 82af2ee4393b6c8004757edbd5a16beef021063f SHA-256: 5ad766224e9eabf018e96d9cad606404c15198f424be6bbbf6b9312a81a2408f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs, such as 'https://traffnew.ru/strik?utm_term=roundup+quick+pro+mixing+directions', likely serve as the initial point of contact for delivering a secondary payload or redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=roundup+quick+pro+mixing+directions PDF link annotation
    • https://cdn.sqhk.co/wediximewoza/jayUijO/70372990527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5fe928ac1590b.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/f32a19ad1.pdfIn PDF document text
    • https://cdn.sqhk.co/gidurekigov/Egegjja/transport_it_idle_tycoon_mod_apk_unlimited_money.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/tibot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379374/normal_5fbfcc3ca0254.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/nitizobuv/82226200517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f7f8d3-1e50-4e8c-8395-254758e9a46e/sumagemakadisivazokume.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/42259997696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff4dd4e-ea91-49ca-a610-a79ba84caf46/9874189445.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/godapebolijokiketesaluvev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22b8f26-bc3e-4e5f-bc0b-194e25bc75d6/44880445034.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/62469550497.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/25019787887.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_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 5416 bytes
SHA-256: 6ff662dbc919243cac19a95b8e2b06b4c5b18ea999d7fded129ee5d5572e9279
font_01_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 11468 bytes
SHA-256: 610a0a7d4f2a9367d866930f08a07aa1a42eb21603e81c25d40524a5bba2fc28

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