Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d853c7e2bbf373…

MALICIOUS

PDF

68.5 KB Created: 2021-03-10 06:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f6046dfe0f61f3235ba78fc6ab05f4f5 SHA-1: a356ab1340749beaaa852b18a4f7a2850900e88d SHA-256: 98d853c7e2bbf373e8acf25e16c13abae87b541c86e5be0ff60e8c06a7dcfdbe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to a domain associated with phishing or malware delivery. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a large number of links on disposable hosting, suggesting a spam or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://soxebez.ru/strik?utm_term=ace+personal+trainer+manual+5th+edition+pdf PDF link annotation
    • http://fupodiruza.66ghz.com/idsa_guidelines_pneumonia_aspiration.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/2876869.pdfIn PDF document text
    • http://tawiwadebez.iblogger.org/dictionary_of_public_administration.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/what_are_the_different_phone_operating_systems.pdfIn PDF document text
    • https://bozusobogopi.weebly.com/uploads/1/3/2/7/132711975/c79bc0ea605aea.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/what_are_the_three_basic_parts_of_a_newspaper_article.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/32155283062.pdfIn PDF document text
    • http://rifajobabinafe.22web.org/45851289386.pdfIn PDF document text
    • http://felagem.getenjoyment.net/hunger_games_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotavuwejopilo.rf.gd/browser_performance_test_online.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_4b3c64f439f047779f2b65e2a8d92a9a.pdf?index=trueIn PDF document text
    • http://voxedolap.epizy.com/bebom.pdfIn PDF document text
    • http://gedonisezif.epizy.com/zudiseginuxizefamiga.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_20670499d39d40ba8a275b52a53431eb.pdf?index=trueIn PDF document text
    • http://fezavirofi.epizy.com/68400099590.pdfIn PDF document text
    • http://nonulalomijowo.epizy.com/publicly_traded_partnership_k-_1_reporting.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/why_is_my_camera_upside_down_iphone_xr.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_a5aac17bb68948118d64de5e738394b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/solving_inequalities_worksheet_7th_grade.pdfIn PDF document text
    • http://kowelakava.rf.gd/blender_animation_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/south_carolina_dmv_form_mv-_93.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_off0000cde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE4 5508 bytes
SHA-256: 266376b3f19cf29b9862dc24081ebade3481a1599162e2f2ebdd22f3f878e92b
font_01_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 10700 bytes
SHA-256: 02804519369023490cbc60469ed47327bc336bd66df09240cdfedcf2aeeb2f29

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