Malicious PDF — malware analysis report

Static analysis result for SHA-256 e012b9b67fdff534…

MALICIOUS

PDF

70.0 KB Created: 2021-04-19 13:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 28872f3c7270f24b185de565c421a3be SHA-1: 21de76406c2cf7fab512dfa6fcd61995ceeab404 SHA-256: e012b9b67fdff534855463580bd169cc78cfa363b370db40c14d1088cd6ccfed
126 Risk Score

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 0.9998

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 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://xezojetit.ru/strik?utm_term=how+much+does+a+mental+health+counselor+make+uk PDF link annotation
    • http://puwexakibo.iblogger.org/banjara_video_song_number_padal_ing.pdfIn PDF document text
    • http://vikunokanafigul.66ghz.com/1254838590.pdfIn PDF document text
    • http://lighterusb24.site/throne_of_glass_review_blogx4g3j.pdfIn PDF document text
    • http://discount50.pro/beauty_salon_special_services_2016cbjgm.pdfIn PDF document text
    • http://bigtittybella.com/old_bollywood_songs_320kbps_freenw468.pdfIn PDF document text
    • http://sberin.xyz/3913370082ugqmx.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/how_to_connect_hopper_to_hopper_xboxj4skj.pdfIn PDF document text
    • http://forexgeeks.net/nuzilipivevig8ngaw.pdfIn PDF document text
    • http://levelupguild.com/fivudozitesobujipepajezet1322e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kotopogo.rf.gd/18230479166.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/holmesglen_nursing_uniform.pdfIn PDF document text
    • http://nupuzasig.epizy.com/alone_man_hd_images.pdfIn PDF document text
    • http://bonitadobizaw.epizy.com/electron_configuration_worksheet_1_answers.pdfIn PDF document text
    • http://bojivudotafaf.epizy.com/free_uc_browser_fast_apk.pdfIn PDF document text
    • http://dibulazovila.rf.gd/nevizulawurakov.pdfIn PDF document text
    • http://zarilapaserit.rf.gd/sophocles_antigone_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/feduru.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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 5296 bytes
SHA-256: 9933692b776e29eae2a7b9966705e638ed48844cf4c4c355b59e706c28b9ec28
font_01_sfnt_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 10184 bytes
SHA-256: 59653bd74e2add7b9daff2d437510f0193060519514e5e0e88fb866266433266