Malicious PDF — malware analysis report

Static analysis result for SHA-256 e210103cf4db5bc7…

MALICIOUS

PDF

80.5 KB Created: 2021-03-23 20:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d82e8fbd8f99c396a60ae243c0f5fc2 SHA-1: 5cc79f03d879b18af2f3a240f09c11c90c458d71 SHA-256: e210103cf4db5bc77210b36ea92ac0fe671ecea9bb8a97cc84a713553b85ee57
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=canon+powershot+s2+is+review PDF link annotation
    • http://suxelutete.22web.org/multi_channel_data_acquisition_system.pdfIn PDF document text
    • http://vemazewikale.22web.org/idle_heroes_twilight_stone_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_600f5d3352ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_604315c291d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_6014aabb67979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigivemarigefa.rf.gd/2020_buick_regal_tourx_owners_manual.pdfIn PDF document text
    • http://nanoxunukudije.epizy.com/35898589921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b525b27-ac2f-45ff-bf7b-5471daff3404/gofakuwumijiwu.pdfIn PDF document text
    • http://vewevilamavem.rf.gd/micro_turtle_beach_420x_reset.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/que_es_desprendimiento_de_placenta.pdfIn PDF document text
    • http://vipujaxetixise.epizy.com/zidekotepevivapowawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257e105f-2033-4166-8644-c5deb3723407/best_arduino_projects_2016.pdfIn PDF document text
    • http://zokidogonaz.rf.gd/absalom_absalom_online.pdfIn PDF document text
    • http://mudepenota.epizy.com/larivotor.pdfIn PDF document text
    • http://bukuzagalu.rf.gd/budismo_nichiren_daishonin.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/81032208057.pdfIn PDF document text
    • http://livufuxe.epizy.com/vegikanisajadab.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_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 5064 bytes
SHA-256: 7d76317a583494eb8735f916506b10ff06f87052edeead1d37ffe34ba7298d6b
font_01_sfnt_off00010e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6F 11376 bytes
SHA-256: 309e9b8444594a9ecedfb6d11b51c853e738e96d483848eeb380f4888fc95d62

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