Malicious PDF — malware analysis report

Static analysis result for SHA-256 2083b62a36b7a5ab…

MALICIOUS

PDF

110.4 KB Created: 2021-03-20 17:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 57da1a573ecf201023465f24f5723fb8 SHA-1: 70efcdf7ea1747f61662500d171b630187d65b72 SHA-256: 2083b62a36b7a5aba617a8193772534bc3e819ef47ff2123293d7500cfd79d56
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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://jumiwimov.ru/wix?keyword=software+registration+typically+is+required+for+the+use+of+the+application.+true+false PDF link annotation
    • https://vosewisujar.weebly.com/uploads/1/3/5/3/135398140/mubuki.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/4931f356536.pdfIn PDF document text
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/xegaru_mumovuxu_xifojim_nasotem.pdfIn PDF document text
    • http://tujidal.mypressonline.com/how_to_reset_tp-link_smart_plug.pdfIn PDF document text
    • https://jezonekapinojel.weebly.com/uploads/1/3/4/6/134619201/lifidemarebosilap.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/google_classroom_tutorial_for_teachers_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kixulal.rf.gd/mugowefedu.pdfIn PDF document text
    • http://lobosenus.epizy.com/how_to_connect_to_honeywell_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/exercises_on_mixed_tenses_with_answers.pdfIn PDF document text
    • http://kodataruturi.rf.gd/36424246240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52686455-097c-424b-832b-36b498b7e80e/ramuxifivib.pdfIn PDF document text
    • http://xasitotimokines.rf.gd/73420145798.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/status_for_fb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8930df1-bde1-4a8d-97d8-cf7e9ef04d03/96553233045.pdfIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/minecraft_galacticraft_1._7._10_guide.pdfIn PDF document text
    • http://lipaxunuvevi.epizy.com/63725649462.pdfIn PDF document text
    • http://gavofime.atwebpages.com/sipenipomuligelub.pdfIn PDF document text
    • http://rovunebezub.epizy.com/36785247317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2f80f7-b882-4f43-beed-32cebbb9e9fa/56543616836.pdfIn PDF document text
    • http://wegefidipa.epizy.com/reading_comprehension_strategies_worksheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8C 5752 bytes
SHA-256: 91fe4bea1c1bf88e30d80c81479275845c0e4aaeee3f77bd4d18d68431c64422
font_01_sfnt_off00016025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16025 11332 bytes
SHA-256: fba823f75a5885f6c2cda5f6375b4790e06fac0b43c8abe08f7b54571058c82c
font_02_sfnt_off0001873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1873A 16112 bytes
SHA-256: 04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292
font_03_sfnt_off00019c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C0A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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