Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24b700adb819966…

MALICIOUS

PDF

82.3 KB Created: 2021-02-19 10:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8f8517ee57160b4e9b620baa71b423ee SHA-1: e686a54ea8f756acfd398680833147e1af16cf88 SHA-256: e24b700adb819966725d643d23ee5a199ceea5c1ad32f1eb1440efa7f6e82b72
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

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://baarspo.ru/strik?utm_term=ultimate+shred+stack+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465390/normal_5fe49ac0e3b9f.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/fjcfS02/marshawn_lynch_westworld_gif.pdfIn PDF document text
    • http://erethiztzj.space/mad_max_fury_road_full_movie_in_hindi_download_coolmoviezvm2h1.pdfIn PDF document text
    • http://gebikatafexanu.22web.org/personal_information_form_template.pdfIn PDF document text
    • http://piwudev.iblogger.org/cdl_general_knowledge_test_study_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/gfGhege/pogugevaxaretotal.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/jagejgX/66559761870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_602dd49c40436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5fe75d881bafd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_600d12dbed6c9.pdfIn PDF document text
    • http://wowmarket.info/wifi_password_problem_iphonednw2i.pdfIn PDF document text
    • http://fdvsefwfrw.space/stacked_bar_chart_ggplot2cpphc.pdfIn PDF document text
    • http://copyrightprivacy.site/war_movie_ringtone_musicd507c.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/jljh3ii/rap_song_maker_online.pdfIn PDF document text
    • http://hq-cleartv.info/56014067016bfdk7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xevazuguvapuj.rf.gd/69250003717.pdfIn PDF document text
    • http://fetufebutegiv.rf.gd/94971306257.pdfIn PDF document text
    • http://mitudosukekunif.epizy.com/tagavisuzufelozawevikisev.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_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 5384 bytes
SHA-256: 8e2f2a55d279bceec451c43c0d2e7a60e68e05ed63ee744ee1808044d53e847d
font_01_sfnt_off0001155d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155D 11484 bytes
SHA-256: 43ed09db40a6fb7e5e013a1545b42683d4bc4b004d737616bfe6e93f790b3d6d

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