Malicious PDF — malware analysis report

Static analysis result for SHA-256 7952dbc38bf5e7fc…

MALICIOUS

PDF

76.7 KB Created: 2021-05-18 06:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aabf74c061000af0f97bc86c38a7b2c0 SHA-1: 741d0aa017be5cd444d7784009073dcaa61086f9 SHA-256: 7952dbc38bf5e7fcf79d895b0e6d6cc1d5e5c214cc0fbda1549ed50da1b47da6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scam purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://botokaw.ru/strik?utm_term=how+to+prepare+yourself+for+a+scholarship+interview PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5fe6c2d090731.pdfIn PDF document text
    • https://gagoduxo.weebly.com/uploads/1/3/1/4/131452981/6121370.pdfIn PDF document text
    • https://levevozupub.weebly.com/uploads/1/3/1/4/131407214/jujuxitanav_fanavu_dafawo.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/casio_chronograph_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_601dcce195086.pdfIn PDF document text
    • https://kukuwusak.weebly.com/uploads/1/3/1/3/131379738/4132867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_602e37a423331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406166/normal_5fc92ea1814e3.pdfIn PDF document text
    • https://kogijusixi.weebly.com/uploads/1/3/5/3/135312463/f491d5aecc0a6e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d4a76a2b-1963-4c81-9abf-6bea6e314da7/4589798193.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/38021006950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30245ceb-ebf9-481e-bf21-fb0fec36c646/64701126365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f649f8e7-96d8-4802-bceb-168159e089a4/71643696998.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/icebreakers_for_online_meetings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/096a9555-ee9f-419a-997b-a7f10ab1603a/tutilewigabokigexikukuze.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/25892620297.pdfIn PDF document text
    • http://vulaxojanomu.rf.gd/16048621243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e7020e-e828-4a9a-a286-03a2e63fd2ee/a_discovery_of_witches_season_1_episode_8_review.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/83608255729.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/why_is_my_ac_unit_fan_not_spinning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 5200 bytes
SHA-256: 25f58adb1111a38595f0e65eaff7fabd4fe8f024ebc6048ea7c18d6406c8b86f
font_01_sfnt_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 20128 bytes
SHA-256: d5a2c004a42afbb37ad393a6815b63fdc447979ff7f744a535562fb6610e8763
font_02_sfnt_off0001154a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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