Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dd0ccb69a6cdc3…

MALICIOUS

PDF

95.4 KB Created: 2021-03-04 06:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0cc9cf70d4a05806970ceae03348eddc SHA-1: 5227439b2f9611ef6ae989750ed8af05190c5c94 SHA-256: e4dd0ccb69a6cdc3f4c7212972e856ba67293a2f4be41d7b1137b9f3670a8bcc
186 Risk Score

Malware Insights

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

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 6

  • 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 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.
  • 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://seumenha.ru/strik?utm_term=what+is+the+nation+newspaper PDF link annotation
    • https://funifagokose.weebly.com/uploads/1/3/2/6/132681236/tajuladil.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/Ujgjeha/jbl_link_music_speaker.pdfIn PDF document text
    • http://thecet.xyz/seger5keje.pdfIn PDF document text
    • http://kokilubowo.22web.org/18399454685.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/hKgdjjc/australian_f1_tv_coverage_uk.pdfIn PDF document text
    • http://seamanygau.best/89290396311lljk9.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/bda14cecf.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/jhyrHjf/jewanixadef.pdfIn PDF document text
    • http://pevokepavaxe.iblogger.org/marine_weather_report_miami.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/v7g3ghc/fesovitipawiwibifodedov.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/jhge2eo/ringtones_galaxy_a20.pdfIn PDF document text
    • https://tupimala.weebly.com/uploads/1/3/4/9/134904604/kadejesipifojod_vaxemirako_janigasarare.pdfIn PDF document text
    • https://cdn.sqhk.co/wibafozadil/hbgicbZ/pinball_map_in_flames.pdfIn PDF document text
    • http://presentinsta.site/69932740066xy37r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://purumurik.epizy.com/schweser_promo_code_2020.pdfIn PDF document text
    • http://pumugotodag.epizy.com/star_wars_high_republic_comic_release_date.pdfIn PDF document text
    • http://xuvunemomot.epizy.com/rugamumexitubigog.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_off00013a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A00 4980 bytes
SHA-256: bbcb5a884408e20f85340104a31dee3aa58091d100115b8e4debdd220cbe7890
font_01_sfnt_off00014aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFF 10944 bytes
SHA-256: 039fb3b25729f7d1648d10d499872a86f883347eab7f94329988b4072ced9b65