Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e039a06c957d19…

MALICIOUS

PDF

75.4 KB Created: 2021-03-31 19:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c14b533ecc6e709db98a0fe9363f72de SHA-1: 2df2f945170fe3eb9c90aa59fc4ac109514d18a0 SHA-256: 02e039a06c957d198dd6707d78e381df231fc5bf2780819d08384e2531cb8f3b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a disposable hosting domain and using UTM parameters, indicative of a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

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://botokaw.ru/strik?utm_term=free+html+books+for+beginners+pdf PDF link annotation
    • http://rovebagilin.22web.org/xavirazeg.pdfIn PDF document text
    • http://meziradidanaru.iblogger.org/what_is_the_outdoor_code_and_what_does_it_mean.pdfIn PDF document text
    • http://uspeh.icu/what_to_cook_in_my_air_fryer_for_dinnerw2bzs.pdfIn PDF document text
    • http://uchebnoe.website/soccer_superstar_gamevil_apk0sthk.pdfIn PDF document text
    • http://monongzhlh.space/evil_officer_horror_house_escapezx6be.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/idjcUjg/43061741070.pdfIn PDF document text
    • http://copyrightnotices-form.com/what_you_think_buddha_quotesf4ui4.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/42923978622.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://chatik85939775.fun/usa_today_nfl_picks_week_1_2020ua1nh.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/pdf_budgeting_101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sukokovevaz.atwebpages.com/7775150015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4118f320-6917-43fe-bbe7-406ed378f21d/texas_instruments_ti-30x_iis_exponent_button.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/67861341264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63bdb7c-8c91-4b75-a776-8aa015efaf51/vizurepazojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888232b5-f2b4-41c6-92e8-cacacb558607/what_is_the_general_systems_theory.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 5192 bytes
SHA-256: f066c9a0085eec7b1fb48cef22885c25f5f9ccad339d8227b69594f260b66bf6
font_01_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 10812 bytes
SHA-256: 5bfd6a8a70a3c209be9547d96e68f6655973e9c835b6b32259fd6dbfc6e8fce6
font_02_sfnt_off00011235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11235 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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