Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02149f505175239…

MALICIOUS

PDF

76.0 KB Created: 2021-03-24 23:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7a2862d1d90ad9373586ef59b47b5446 SHA-1: 53f631fcc40c5cc7087c407053544a2919263278 SHA-256: e02149f50517523964c6dadc7f1706a4c047d35c54f7913910f04899321c1aa1
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 0.9998

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://leonvi.ru/wix?keyword=kansas+science+olympiad+results PDF link annotation
    • https://cdn.sqhk.co/buwisotubu/ibhdgil/dungeon_defense_wiki_lapis_lazuli.pdfIn PDF document text
    • https://jegokama.weebly.com/uploads/1/3/4/6/134651242/laloniragurawu_jokuvetura.pdfIn PDF document text
    • https://keboxineb.weebly.com/uploads/1/3/0/9/130969034/a987ac75c78478a.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/a74f4b3e02280b.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/NsPific/warcraft_3_reforged_tavern_heroes.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/5687216.pdfIn PDF document text
    • https://buwupejobo.weebly.com/uploads/1/3/4/2/134265589/6f2c8b61adaf7.pdfIn PDF document text
    • https://fuguweraxawu.weebly.com/uploads/1/3/4/6/134684603/ribif.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/80cc81294.pdfIn PDF document text
    • https://faxilazow.weebly.com/uploads/1/3/4/7/134725206/5521134.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/igi3jap/furia_de_titans_filme_assistir_online.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/webuwi-romopu.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/ijajbie/94578006863.pdfIn PDF document text
    • https://fuxekuliwomu.weebly.com/uploads/1/3/4/8/134864819/todozidiva-fibivez-jibor.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/9882e52d-3f36-4c88-a576-0a4bd0ec3943/how_to_pair_polk_soundbar_to_xfinity_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5446f9-8070-4a5d-ad1b-8a20bbdbcd10/how_many_carbs_are_in_a_steak_quesadilla_from_taco_bell.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_592ba06da864425caaa0d82d551eb693.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_12108341f3f5460aa43b8648ffac4642.pdf?index=trueIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_868e0cecc79a4a8d9cae4d3376132256.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_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 5288 bytes
SHA-256: 1d7b54a1c441e850c63b2b608aa065835918dd7f35519661553cd3a57493d6fe
font_01_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 10856 bytes
SHA-256: 45c5dbd278dc20f9c0e0f61fc03d05d16631a7676f7d0753aac5b4d7fafb1f1f