Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ee63df1de26ff4…

MALICIOUS

PDF

73.8 KB Created: 2021-02-25 15:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8a2724ce8832569c33d608a8e4f0da49 SHA-1: 7ffdbef4073a7d0689afcd8b8ceafdc774d17f93 SHA-256: d7ee63df1de26ff455a909b1ac176f17a06afba56f443d87d0905dbc89b2631d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are designed to mimic search results for popular topics, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of multiple suspicious URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites.

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://crophysi.ru/123?utm_term=what+is+the+series+stranger+things+all+about PDF link annotation
    • http://1xbet-regi.site/process_flow_chart_template_excel6m3jq.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/earthquake_news_report_snl_scriptxmjur.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/ihIe9re/posubiru.pdfIn PDF document text
    • http://masalev.ru/dozaju2govz.pdfIn PDF document text
    • http://mybatut.store/utah_rifle_elk_hunt_datestlp7o.pdfIn PDF document text
    • http://cafechorsu.ru/best_wap_in_dj_song_2019tdnfm.pdfIn PDF document text
    • http://tixshopclub.fun/backdrop_material_design_android3jjmg.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/wakadu.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/W9u0XtA/45874547866.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/hbhdPhj/36969662054.pdfIn PDF document text
    • http://myfirstsite.xyz/44533540463kch54.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/viregujipowuru/56403986319.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/anjathe_movie_hd_video_songs_free.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_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 5100 bytes
SHA-256: c6116a1baa6fbaf419573a2980981f2529a776cc0f17c44a8b781e8fa2855df4
font_01_sfnt_off0000f709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 10400 bytes
SHA-256: ccfda098419c512c9411302edc679292f19aadd8214cddf73ebcedf6aa3ca0c0

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