Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecce00b48fc1a35…

MALICIOUS

PDF

88.2 KB Created: 2021-04-13 22:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a40363e092316e8fe1bc020cb9e02f8d SHA-1: 289dc75fdde4d7d7e82a07beb05ae6a93fc96039 SHA-256: eecce00b48fc1a35f9376072e6d17d1866730694bdd6cb8b9e9cf70b94b3ed8c
156 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary URL, 'https://leonvi.ru/strik?utm_term=how+do+i+turn+my+camera+on+for+messenger+windows+10', appears to be a lure disguised as a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through the numerous linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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/strik?utm_term=how+do+i+turn+my+camera+on+for+messenger+windows+10 PDF link annotation
    • http://lejazubi.iblogger.org/domino_s_pizza_menu_australia.pdfIn PDF document text
    • http://tonozezoziw.iblogger.org/2806859368.pdfIn PDF document text
    • https://libirobu.weebly.com/uploads/1/3/5/3/135336219/9188828.pdfIn PDF document text
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/bf9aae1c.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezutu/metso_gyratory_crusher.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/masudoxozuturukaxenavata.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/aaja_mere_mahi_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/gurese.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/world_history_project_based_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/kenubazakubojolojemapajo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/fovamenifed.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/what_is_the_salary_for_international_business_major.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/supersonic_tv_remote_codes_for_directv.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/punjabi_wedding_couple_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd937d92-7246-43a3-9f03-9319e2c46785/computer_systems_analyst_salary_los_angeles.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/80377034087.pdfIn PDF document text
    • http://xuwanuxetoto.rf.gd/retail_and_rural_marketing.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/chili_s_3_for_10_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce92328-7232-4c87-ae07-c32cb3405577/kovivezejelafewexa.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/54609448534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904b75f3-0009-4604-a0e8-970dbc54278c/bissell_poweredge_pet_hardwood_floor_bagless_cleaner_stick.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 1724 bytes
SHA-256: 90fb1042126c15d8a796f6f88dc26108755fb6ca519e05b6d0de05ca6d3d969f
font_01_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 5660 bytes
SHA-256: 5c17c9e2c4e2ae4857ef8bec1b19a372670d3d312ee485b376af33201963c6c2
font_02_sfnt_off00012af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF6 12912 bytes
SHA-256: a53e63211a2e900ad90f320c56957039371003b4b9862ab95cbdc75c1659a4d8

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