Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f86827a33c628d8…

MALICIOUS

PDF

71.8 KB Created: 2021-02-22 03:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8b79373d54d20e8776519d3daaf8080b SHA-1: c32fd268d82aa42556fe421df7cbc5c923a5c288 SHA-256: 3f86827a33c628d8b641fe2fa634c11a15520856abdf703d45f8ae7dffae048c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=fancy+pants+1950 In PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/5904ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383471/normal_5ff66cfb1f89b.pdfIn PDF document text
    • https://wigalibole.weebly.com/uploads/1/3/0/9/130968912/gikidivinamijubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fe02a5ada238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_602869a89e78d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_601937bbe7c8a.pdfIn PDF document text
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/7128105.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/1485807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fe79d4b04031.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/7736143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_6009c581190b6.pdfIn PDF document text
    • https://wajizewikibi.weebly.com/uploads/1/3/5/3/135326478/ade9e7a65bb845d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376875/normal_600540a27f622.pdfIn PDF document text
    • https://kemiponoza.weebly.com/uploads/1/3/4/6/134605011/2914362.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/3004686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukijikulo.epizy.com/84984010521.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/33382244548.pdfIn PDF document text
    • http://bevivose.rf.gd/automation_feasibility_report_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/61563645004.pdfIn PDF document text
    • http://suvubojetixag.epizy.com/uiic_vehicle_insurance_app.pdfIn PDF document text
    • http://wawutanow.epizy.com/accessing_and_ing_my_facebook_account.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/watch_anime_tagalog_apk.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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5328 bytes
SHA-256: ff637e21262a346d031a80a86635c30089653865abc08986d9ed2391f75ec7c3
font_01_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 13012 bytes
SHA-256: b1a8773dad9440767574e111a5d53ac8e4e181b421a06dd56393d188b7b14230