Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cfbc35a64bc7cb…

MALICIOUS

PDF

79.9 KB Created: 2021-04-10 12:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d78764da25ae0403f7bd56fa1be7a6d3 SHA-1: dac4d9c210bdbe552a610e15262f6f448ce06485 SHA-256: 24cfbc35a64bc7cbc12d50786d8151a7acc2b8f4217c30ae69460aeb70fd6e8e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dafemum.ru/strik?utm_term=warhammer+chaos+dwarfs+army+book+pdf PDF link annotation
    • https://cdn.sqhk.co/xuxozowaki/gqiygdS/78891661750.pdfIn PDF document text
    • http://poxexududojal.66ghz.com/77110923838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_5ff5734e30cc9.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/hbkjha2/80320002079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_604dd4ed6e276.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/hpyYgdW/android_9._0_pie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_604f2a6a25d7d.pdfIn PDF document text
    • http://dafusunefu.iblogger.org/judex_priest_ragnarok_mobile_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/ibPiija/rijujafuku.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/b1842068-0c9e-4c34-b68b-dd0a073ec03b/rojokuvesowusebakaguje.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/texuvawokokeboniked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71331fd3-301e-44c9-a8d0-872c991f1231/biblia_de_jerusalen_online_portugues.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_ce4771c285d84364b3efa3291585ae8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cfdc6f-68e4-40b3-9049-a1e906d54383/zikivuzoferem.pdfIn PDF document text
    • http://towaduzabuxake.rf.gd/39104612013.pdfIn PDF document text
    • http://xamazaxalezamat.rf.gd/fishing_report_texas_city_dyke.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_d21d5e98774e4d4fa8d480d47e788211.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c0e251-768e-40ad-a8a9-a8a098a835e0/sewolusivagodudaleladewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6311a4-d8b7-4000-b30e-93af72e44dc2/lds_temple_preparation_manual.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_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 3396 bytes
SHA-256: 0601ee170beefadf5828a54dec5269578bd0ef23105077a67ee3d6b2c86b4418
font_01_sfnt_off0000f5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 5772 bytes
SHA-256: 9f9d580178fefb65322f5099e543ddf46dc6e6562ae46baa08888b16b2ce7a74
font_02_sfnt_off0001095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 11496 bytes
SHA-256: a5fc13030bed9e89eb383d0e44a323e91a0f8cf4e480519230507de99ca461dd

Open this report in the interactive analyzer, or submit your own file for analysis.