Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96de4550c4940d3…

MALICIOUS

PDF

72.3 KB Created: 2021-06-04 21:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e098be83a42211d4e1487cf9446bd772 SHA-1: 747e55e97972b4dc0966f23d1d43a841f0d6d759 SHA-256: f96de4550c4940d3945815b7c4bce45b3f029000c518c71a7598d7606523dfe4
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://pixomot.ru/pbw?utm_term=ios+6+zip+file+download+for+android PDF link annotation
    • https://jotuxopa.weebly.com/uploads/1/3/4/2/134265841/bilajowedubug.pdfIn PDF document text
    • https://duzofonateras.weebly.com/uploads/1/3/4/4/134494902/vudufulu-ruzomipo.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/e8338675-06ef-408d-a59a-1aa9c46d88c4/xodimaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85078c64-dca7-4fe9-9639-35736354e39d/zojirushi_bread_machine_recipes_whole_wheat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a84b0e6-b3fc-4e5d-8038-5d3d7ca1a8c9/turamimularasinuvugazod.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/dyson_light_ball_multi_floor_brush_not_spinning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1222fb-d0fe-4e0c-9cb0-45470652d914/72370083811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03780459-0508-49c3-83fd-469ca7615356/fufon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb940b6-cd53-43dc-96d8-2b64e3f0a714/lawnboy_services_inc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dd25bc-8a81-4a95-a064-7e7e4d11c61d/22072296096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f4ed3e-2d9b-4511-abe0-f9b20e6f2ca5/i_pilot_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de01c372-d84b-43f1-8df3-941bd75e20de/lividakaguruxuwiwepoguwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01869712-9aee-4e0a-a03d-65148d07b51f/89671703697.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/f/47751413207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0beff6f3-80bc-4486-9881-65b5ecbd903e/how_old_is_miles_morales_in_the_comics_now.pdfIn PDF document text
    • http://gezebal.pbworks.com/w/file/fetch/144606891/hybrid_dictionary_attack_apk_download.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/w/file/fetch/144511833/fake_experience_certificate_for_mechanical_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b056cb-43dd-4e3b-883a-32e3be852e9c/gosolodoza.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/52315251759.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_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 5268 bytes
SHA-256: a3c1e37c75206b758ae8e86f2573535c2dcac2d061320f89944fba7bc1cc48e8
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 10188 bytes
SHA-256: 9383546e12175ef3dd7b104d741a2a8d96163fa49601ce42d63bfda974602d18

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