Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1cdd996d526fd8…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 05:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e0b12f0f7e478dd39554b7f4ce927d4c SHA-1: 4457076ae957cc8b55ff5388c2e597380cc76f29 SHA-256: 5e1cdd996d526fd818659090047a4592000dbe1380beac1cbd6731e472cbe5cb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to obscure the true destination or host malicious content on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=brookstone+automatic+wine+opener+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456143/normal_601bc1e1da295.pdfIn PDF document text
    • http://lnstagramverifycentre.com/how_do_you_reset_samsung_fridge_filter_lighto44s4.pdfIn PDF document text
    • http://todayshop.website/98102202058u7an8.pdfIn PDF document text
    • http://wide-mean.top/allahabad_high_court_judgement_ordervr55e.pdfIn PDF document text
    • http://vilopeg.xyz/diary_of_a_wimpy_kid_do_it_yourself_book_download78lij.pdfIn PDF document text
    • http://teagreen.space/green_pants_mens_jacket5cw9k.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/what_is_breaking_news_today_in_india.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/liwugexebotidunumejenemus5wknu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501486/normal_6025f1f7575cb.pdfIn PDF document text
    • http://vsspb.ru/litigilimegurumefupewls7vs.pdfIn PDF document text
    • http://qwert-ita.fun/lapidejakoxijonijinb6o1l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485698/normal_5ff19c0c79979.pdfIn PDF document text
    • http://comp-arenda.site/andorra_piste_map8rg4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzivuzox.epizy.com/juseruwefatoziferilivet.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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 5284 bytes
SHA-256: a83257090272e180e13048eb644b4a3386ee966501f1a4d9070bfa7eea6405ea
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 10184 bytes
SHA-256: b747adf65e39843a93796f692ddd2700d060e2f3db199db7cb22a93806916829

Open this report in the interactive analyzer, or submit your own file for analysis.