Malicious PDF — malware analysis report

Static analysis result for SHA-256 de214a3a8124cc5a…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 15:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8783490c001ca5afaa9fa8e2061ad3f3 SHA-1: 8f8c64b772777ef5de3bacdc915a7a10778b6b6d SHA-256: de214a3a8124cc5aaaf4aeab5da5b3258543bb80a90594a45d8fd6ac3907ace9
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 0.9997

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://gimoguvi.ru/strik?utm_term=jbl+eon+615+bluetooth+app PDF link annotation
    • http://goxakawelapa.22web.org/29304492939.pdfIn PDF document text
    • http://prizinsta.online/94380436296297bk.pdfIn PDF document text
    • http://ijmalan.xyz/agoraphobia_dsm_5_criteria5a3bq.pdfIn PDF document text
    • http://mononorupetajo.22web.org/canapes_menu.pdfIn PDF document text
    • http://luzikudejijes.22web.org/gitlab_merge_request_template_title.pdfIn PDF document text
    • http://phillipen.online/wofukotenixobusajofuwoni4iofy.pdfIn PDF document text
    • http://digakegenuses.iblogger.org/how_to_use_gopro_selfie_stick_without_remote.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/column_chart_template_google_docsxjnmf.pdfIn PDF document text
    • http://gafinobadar.iblogger.org/gigekozafudizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubukemudug.rf.gd/55688330977.pdfIn PDF document text
    • http://zitovidenelanus.rf.gd/the_heart_of_change.pdfIn PDF document text
    • http://xarigezosuwa.rf.gd/dezuvepozagefilusev.pdfIn PDF document text
    • http://mugevewobota.rf.gd/45274007592.pdfIn PDF document text
    • http://sefogozi.epizy.com/nipifan.pdfIn PDF document text
    • http://nojudadosuzaxi.rf.gd/zarijogofo.pdfIn PDF document text
    • http://kijurisotam.epizy.com/sql_server_2016_sp1_free.pdfIn PDF document text
    • http://sebilazog.rf.gd/53124575567.pdfIn PDF document text
    • http://pebulibupa.rf.gd/ensayo_sobre_el_autoestima.pdfIn PDF document text
    • http://wuwomuwudawim.epizy.com/cuisinart_chw-12c_problems.pdfIn PDF document text
    • http://nunivigel.epizy.com/buwisimugerot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91E 5092 bytes
SHA-256: 5ad2f34cd01b63b29289aef47205ba0067681f9a3752248b23d83281c06a8880
font_01_sfnt_off0000ea72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 10676 bytes
SHA-256: 9ed8a69ee8eb1a7c65e627319ffa1881499ee307e08a5404cea9095ffa99437f
font_02_sfnt_off00010f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c