Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5787217668e412…

MALICIOUS

PDF

77.6 KB Created: 2021-05-29 20:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88756f62efa36dd75e53174863ac5dfc SHA-1: 939afa255c49481f2f253a03043cc3bb62b37df3 SHA-256: ee5787217668e4127f6bc02c55e937c053d6b92f921533903712a72ffaf5b006
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=lovely+by+billie+eilish+sheet+music PDF link annotation
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/1517312.pdfIn PDF document text
    • https://nozirokopen.weebly.com/uploads/1/3/4/6/134613575/nejadenorosol.pdfIn PDF document text
    • https://latijivetazemor.weebly.com/uploads/1/3/0/7/130775002/2791f7.pdfIn PDF document text
    • https://gobazivow.weebly.com/uploads/1/3/1/0/131070387/77e3ed6e918.pdfIn PDF document text
    • https://sinujezujano.weebly.com/uploads/1/3/1/6/131606051/4840736.pdfIn PDF document text
    • https://vunuvuvoxi.weebly.com/uploads/1/3/4/8/134889930/xonufewinibetib_lexiporeme_muwil.pdfIn PDF document text
    • https://lefukumot.weebly.com/uploads/1/3/4/8/134887275/dakevusikabile-nonemowemiguzo.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/e7369c88-550b-45f3-876b-9997a452010b/libelonokof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d272bd8-8213-4ac6-a358-3bad393a796d/26432629998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42179f2c-a5f6-499e-980d-7a2a9d913121/fuwabogukadog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa1370d-4004-4093-9082-c391644c0aff/programacion_del_plc_siemens_s7-1200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62f186a-0709-4184-a7d2-1abe094237f6/57937064958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d088489e-59f1-48c8-8994-e14b3f243754/resumen_la_leccion_de_august_por_partes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b5329a-600d-4a6d-bf3e-a8ef8b5ee0c4/dunkin_donuts_medium_frozen_mocha_coffee_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4364f670-d3ac-412c-9237-96dd5ca883ae/town_lake_trail_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e168f1ea-2eb9-4dc7-9ccc-29c130db7dca/22601531911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de532c6-b1e0-43d8-b235-03838e14b84f/maytag_bravos_washer_diagnostic_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199d98f0-ef04-461c-8697-1e21b91c71a9/whats_a_female_alpha_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120ae360-0272-403c-b07a-3b806b91f438/jedarizebuvumu.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_off0000f382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 4976 bytes
SHA-256: dde9c2202fba86198ba962961dc18b7b19824f94928e0efc3fc04a6e1b88cdb0
font_01_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 10720 bytes
SHA-256: b6ce41031b048c8c5c0aa2f2b1fbd67628467a63aadcff40469312be93656a3e

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