Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ccc2950cc75764…

MALICIOUS

PDF

64.6 KB Created: 2020-11-27 06:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0c15a2966e0700895413599696cb670f SHA-1: 93829accf9b9036807f7802725c7cf972182993b SHA-256: e6ccc2950cc757647e84b1582d9252814a091f35245d17afbc701e9f34c0aa4b
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 0.9996

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://traffnew.ru/strik?utm_term=la+sportiva+katana+women%2527s PDF link annotation
    • https://birobidusizal.weebly.com/uploads/1/3/4/6/134638138/todogoxozipororunagi.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/vumigi_tavega_paguxoxek_vemaxoluxebug.pdfIn PDF document text
    • https://pinenovi.weebly.com/uploads/1/3/4/5/134509314/nonijabiwupitaj.pdfIn PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/riforita.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/3873212.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/5590945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fa75974a7522.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/4bc222b6-15ef-4efd-89df-9426ffa43317/discord_report_someone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec18f660-5244-47f8-bccd-d065489cbf95/wumolatuwin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae213a6-54fc-4633-90de-0df6be00f39b/14511132342.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_off0000be0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0E 5124 bytes
SHA-256: 00619935b3f57fae070afc6daacc73d3088c31f5511aa92ff35db415b514dc38
font_01_sfnt_off0000cf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 11212 bytes
SHA-256: ae55b71a83819b39f1a610fd988f062a9a5a28a9e27a6955708d356a0bfd1c3d

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