Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d59cb620ba864c…

MALICIOUS

PDF

81.9 KB Created: 2021-03-15 04:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2af92c8714a66922fffa791c6fe9931 SHA-1: 949e1f69b303c0391ea372c73fef1d673e78cb7f SHA-256: e9d59cb620ba864ce54619b600abf6242ecc5593b64ee9dcb1c362c158de9c25
126 Risk Score

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 0.9991

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=vitamix+black+friday+2019 PDF link annotation
    • http://majexifavel.scienceontheweb.net/9312904723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5feba089da455.pdfIn PDF document text
    • http://merovew.xyz/90738799749di5wb.pdfIn PDF document text
    • http://upgrade4me.com/cuisinart_burr_grinder1dvby.pdfIn PDF document text
    • http://ch-redirect.icu/90089137676zw279.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/keystone_rv_furnace_not_working.pdfIn PDF document text
    • http://alex-travel.moscow/zixedinowixisebixunu11otp.pdfIn PDF document text
    • http://copyrighthelpptteam.com/wobubonasogover3jk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_60304a771a209.pdfIn PDF document text
    • http://retys.space/dadokojwgts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_603d1b2dba35c.pdfIn PDF document text
    • http://wei-nmvc.com/majimuzelotosewotek08y7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372987/normal_5ffe1060cbc68.pdfIn PDF document text
    • http://karma-911.com/popama6d9ng.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butukiri.epizy.com/jabojunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d75eac9-329b-463e-9fb6-4acff324a65e/swann_wifi_camera_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886460ee-478f-4650-a726-5fd83595e628/wiselunugis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/053415a3-1913-4a48-8b68-0558d8a0c51a/rikelerawipalasos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976509ac-c435-4ab0-ba9b-e342a15a8b49/58556960873.pdfIn PDF document text
    • http://xubaforan.epizy.com/how_to_unplug_sunbeam_heated_blanket.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/sound_driver_for_windows_7_32_bit_lenovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88ebff9-c83f-42cd-8a05-704f1a96a4fb/california_deposition_objections_deadline.pdfIn PDF document text
    • http://kedixiravupit.epizy.com/the_juliette_society.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 5808 bytes
SHA-256: 06bf0f32223306095757b07ee48ec493920d4a8606d7c4fca2fa3bd0ea7ed670
font_01_sfnt_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 4844 bytes
SHA-256: b4267c2ae3b587cfeb6d9fc0d0c37fbe5c94f4c77dc4b2badf73aa9a55135aec
font_02_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 11256 bytes
SHA-256: 521c538faf579a614968f812a716708e1eb85cf757cf23cfc1830c37866eb83a