Malicious PDF — malware analysis report

Static analysis result for SHA-256 962ceed34cf52ab6…

MALICIOUS

PDF

72.8 KB Created: 2021-04-11 16:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d857c50551e536d8f2ac463409e63199 SHA-1: 23da1df293936328abb94210884b0880ba079e67 SHA-256: 962ceed34cf52ab6baddccbb6b16e39cfebd63ca09d7a6592ffed422fc66688f
126 Risk Score

Malware Insights

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

The PDF file contains a lure related to phone settings, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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+turn+off+dnd+on+nec+phone PDF link annotation
    • https://cdn.sqhk.co/zurefaxenov/Pighgii/netol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471092/normal_604014d724d95.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/KKgiVid/nezutipixozokugeruzakew.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/aschenputtel_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_605f8a807cb86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_6063e5867598e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_602c039ad2f4c.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/hiiejhd/3629274448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_5fd8d4011e5df.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/pjxhjgf/radio_javan_application.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_5fe25998b3b2e.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/mobixedanibasogamunutudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_600abd568e299.pdfIn PDF document text
    • https://cdn.sqhk.co/korebuxaguz/jagiaLS/death_invasion_game_download.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/68531971418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fdb0ccb46f1d.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/23790532835.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/df0095e8-71bc-4f22-9b3b-d5d7bfa6d822/canon_pixma_mx922_ink_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cc4cfd-5571-4062-ac23-daba87db4810/52206238842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8a8a5f-4f14-4a12-814f-5cc15455765c/math_workbook_grade_7_nelson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ee639e-8409-4e7c-86a3-03962f1f946c/ziwemibetogevifujomuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316ba9a2-54f4-4c03-96fc-528568c6a96a/dungeons_and_dragons_dungeon_master_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff88ca18-7389-410d-8093-66b06d3a8689/75354244811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be920ec-8e04-4b97-8802-1e2d5e91a62c/xixuwumef.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_off0000df35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF35 4876 bytes
SHA-256: ac7dc90e365346f81c619d807035a004a0b48ae35d020f5f2060bac9cf92080d
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10652 bytes
SHA-256: 269597753393d9174b51dde290fe0cc211b9c2a7b54dc2c152d4fe78359e76a1

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