Malicious PDF — malware analysis report

Static analysis result for SHA-256 6390ae860f3e2a0f…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 22:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c66f038437ab7538d975d8d0685a34e SHA-1: 3a503fcbf405e6e81a7805d5979934fe26accb65 SHA-256: 6390ae860f3e2a0fe8df82b29ceb3046acd26bb54c589df14f05317beb413478
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://lozipotod.ru/strik?utm_term=best+8+quart+instant+pot+pressure+cooker PDF link annotation
    • https://suzazega.weebly.com/uploads/1/3/4/4/134476369/2015335.pdfIn PDF document text
    • https://jezelide.weebly.com/uploads/1/3/0/8/130874318/konag.pdfIn PDF document text
    • https://zirejuvisipaz.weebly.com/uploads/1/3/1/6/131636922/7390948.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/7629b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_6035563ae3600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376096/normal_60079d11aeefc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_600f26d8452d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_60162fc51497c.pdfIn PDF document text
    • https://pepuxopotu.weebly.com/uploads/1/3/5/3/135390253/6486305.pdfIn PDF document text
    • https://sokudepan.weebly.com/uploads/1/3/1/8/131871622/larap_ludukozifuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gofiguj/widenewadewap.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/88818255930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd9c67d-58a2-42db-a687-343902ce57f7/minecraft_combat_handbook_read_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/39652429500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7118932-d8ba-452d-a446-2cf1bd1a9257/15110093025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddb825c-d0ea-4061-80af-80b4942e8865/xidazax.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/flipkart_realme_3i_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b7859d-e14f-41f8-8429-e77b65e2ff82/sexual_orientation_list.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 5328 bytes
SHA-256: f5963d45bb7c91e6461e5dea368932a59b6c8e5fdc9101f0dd4a17ffea1f5178
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 10464 bytes
SHA-256: 993b5128681b5d7d4558ceb7dbe95c5affcd358d0a357483ddfc097faccae15d

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