Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0034cbe5d293da…

MALICIOUS

PDF

72.3 KB Created: 2021-02-25 05:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6b88ca6e35b573d3836db010f9f596c9 SHA-1: 540d3db5182f3acaa4a955d62ec2e1a0254f29ea SHA-256: 9d0034cbe5d293da2a859bfd54d273d68cb179af16ad867c4077023014af10de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://seumenha.ru/123?utm_term=the+art+of+communicating+thich+nhat+hanh+quotes PDF link annotation
    • http://mobeditobaxul.scienceontheweb.net/stihl_ms310_years_made.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490542/normal_5fd0e5e5d0949.pdfIn PDF document text
    • http://boxidodo.22web.org/cirrosis_hepatica_y_dieta.pdfIn PDF document text
    • http://remontlegko.info/rowulxrr1b.pdfIn PDF document text
    • http://tokigarodam.22web.org/best_vpn_software_for_pc_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/neporezofov/http_www_to_word_converter_com.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/2007_6.0_powerstroke_turbo_back_exhaust.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/my_cousin_rachel_2017_hindi_dubbed_full_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/magazine_interview_article_template.pdfIn PDF document text
    • http://wuriwafu.epizy.com/94350364275.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/denavenuxuwofinadarakif.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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 5336 bytes
SHA-256: 28c7e44db1c5ecec9478e49655797969f47eedd74e6d3f163745a5b43bd9dfea
font_01_sfnt_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 10336 bytes
SHA-256: 8058d06fb6e018026c192935bfe4b6a1edd3cf6f798ff93f75fd33faba93631b

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