Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6ba422adb3733f…

MALICIOUS

PDF

81.8 KB Created: 2021-03-21 20:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5fbc0767695887ae0a6ed9c1749b593 SHA-1: 1120d1e8b7eb0f222b0a96d6cc7490b895d4685a SHA-256: 2d6ba422adb3733f4f002963781a72a0f885ab2fa132e4d24d7e1b89ba73c845
186 Risk Score

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://jumiwimov.ru/strik?utm_term=after+we+collided+sequel+3 PDF link annotation
    • https://cdn.sqhk.co/wasefago/ljhhcPF/somelelujikenifim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_6005e6a9c47e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dozawulu/eigkhcV/falotozoguwigazifikedabi.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cidZlhg/neon_mecha_go_launcher_themes_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/ihwhimb/dental_assistant_average_salary_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/bepasasa/lnidhi4/58986555376.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/bgghfia/klondike_adventures_cheats_no_human_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/mazonixun/jheEuDw/ar_drone_wifi_not_available.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/lfibhjZ/orbix_glass_blowing_fort_payne_alabama.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuroli/xl1jcnx/whip_cracking_app_from_big_bang_theory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_600d3348a23f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_602794b232fb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_2f258b0352d441bf80c43cbb7a6adb2d.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_8fe32571681b46ca802996f24e2e2b11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d8d44e-3832-4064-a9e4-ec847c77ecad/18661486796.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_5fa15f79e4d84b43a2b0849b3b59ad18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8a375a-1952-40be-b83f-16db23ca0865/87115155126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cde404c-22eb-4711-a16c-257aa9ca29ba/lokepoxelijuvisib.pdfIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_39cd5811b61844b2a01f68481afc6972.pdf?index=trueIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_6d2aa872d4cd4852b1c2c710d8e6d1b6.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_845059d31aad4bc4b50b578120d2f085.pdf?index=trueIn 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_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 5176 bytes
SHA-256: 1dae6eb026c2f7e06d2395a298463d3d2883a63fe377d8c8795137aa3ead843a
font_01_sfnt_off000110e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E5 11632 bytes
SHA-256: bbedc409c368a08c63130ad1e89718cbcfa3ffcef2f9807a35130d0a808e8f9d