Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8960465c12432dd…

MALICIOUS

PDF

65.6 KB Created: 2020-11-13 00:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f8820cc775e9c3133b460b5addbb7561 SHA-1: d8628e24b17e0be6ee7d938b2868bd687f818f65 SHA-256: d8960465c12432dd50a232eaea513f70f0191ddd608de83028572a2ada0f0932
214 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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=acer+b3-+a30 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f95f545de6eb.pdfIn PDF document text
    • https://migufakugiguxob.weebly.com/uploads/1/3/4/5/134579218/666153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5faba9660c163.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/6164ecd3-00f7-4cf3-8af8-6cd6a750a129/best_games_on_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4227da9-467f-4aa1-807c-de67a0788979/vavutip.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/87943786208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284c3755-df94-4821-adc7-2266ef9fdac0/78099731135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91aaa632-3e0e-48d2-8017-344457beea5f/tupinoriponuzekibota.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/darkly_dreaming_dexter_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db2772b-d8dc-46d1-aeaf-65bd7e9ae4e0/futorulegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac095ffe-6767-46bc-b979-44b9b46f242a/infinity_blade_3_deathless_mode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539c2bbb-665f-495c-b2c8-12b047420ee5/51149025017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35b193b-395b-477f-8fc5-d84e33746a0d/30183314099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e0a9b7-f72b-42d0-b494-e543eed48e89/400-200-1006-806_is_true.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6729f9e9-d591-41d4-b0e3-1e394c218a4c/lifomo.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_off0000c296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC296 5048 bytes
SHA-256: 067c32bb37173c2d7e26c432050f42fa8301ba0ccbd1d656baaf2dcd04b8b8e7
font_01_sfnt_off0000d3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D9 11312 bytes
SHA-256: d3ef1610691f5e21eebee52011f28226139d14aea76f90f34492bf17c49a7e2c

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