Malicious PDF — malware analysis report

Static analysis result for SHA-256 364ee82d3f2380d8…

MALICIOUS

PDF

76.4 KB Created: 2021-03-27 16:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a7e10a5394662899665817dd91dbf3db SHA-1: 55b4cc41ba012c28ab8dadbe721885eccbcc2d8f SHA-256: 364ee82d3f2380d8f840b7a76c4d7f15623199be2c57ab78d2a01b469b6ad8c2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to distribute malicious content or phish users. The document body is heavily obfuscated, but the presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a clear intent to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/award?keyword=off+premise+catering+management+pdf PDF link annotation
    • https://fejilexa.weebly.com/uploads/1/3/1/1/131163980/dbbe62c92d3.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/kawokabafije-talakezusamad.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/xeguvafudo.pdfIn PDF document text
    • https://penegekefifix.weebly.com/uploads/1/3/4/5/134586424/1276973.pdfIn PDF document text
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/6522579.pdfIn PDF document text
    • https://tatujudipopef.weebly.com/uploads/1/3/4/6/134605081/ca262.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/biruziluvaj.pdfIn PDF document text
    • https://fadagesaxe.weebly.com/uploads/1/3/4/5/134587500/binerojo.pdfIn PDF document text
    • https://birivuben.weebly.com/uploads/1/3/4/6/134618962/nikiwipemulobiwa.pdfIn PDF document text
    • https://nakoliveb.weebly.com/uploads/1/3/4/5/134503524/346232.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/sawofavesubexid.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/how_to_cite_mla_8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pogewukabuk.epizy.com/remuvipixowifekumejediv.pdfIn PDF document text
    • http://parekiwebepis.epizy.com/93972930232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae18052-4b75-41ab-bdec-bc570e04cb29/the_soul_collector_2020_streaming.pdfIn PDF document text
    • http://nevigewiba.epizy.com/gibbs_reflective_cycle_template_toolshero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0506cc9a-b63e-441d-95c8-30ecda247d2b/1881192602.pdfIn PDF document text
    • http://teropisarazo.myartsonline.com/sword_art_online_alicization_lycoris_playable_characters.pdfIn PDF document text
    • http://tiwojojerat.rf.gd/microsoft_autoroute_2013_serial_keygen_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e405bd-78dc-4d2e-a157-87888fc529e3/short_bedtime_stories_for_toddlers_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb15996-7696-4084-bc70-6330b777f36d/jetovoruxuruganutanekun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2524821d-1868-4c5b-911f-7855154a14f3/what_is_the_short_run_production_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b9d50a-3e8c-4c43-9613-449d3a806b7c/8701864313.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_off0000ec45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC45 5468 bytes
SHA-256: 48968f4608ad5481afdea599115faac60b114c64fd382a8300bb0aefb8e9fc1e
font_01_sfnt_off0000fecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 10920 bytes
SHA-256: a5e0fed6dabd39dc8886d0b57166f3b4f596d430bcd94b22d0a4e58eaa230d5f