Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2098ebe75da58e8…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 09:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b148b5574c4702e5eff280c005000fa4 SHA-1: dbab15ea5d556700794ddb0c914bd2e6880d8608 SHA-256: e2098ebe75da58e849afc29daf10b24cb1649deb10d6dfd0bc23f4730c6a9b8c
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The presence of a URL with a 'spotify premium apk' term suggests a phishing or scam attempt to trick users into downloading malicious software or providing credentials. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=spotify+premium+apk+2018+november
    • https://cdn.sqhk.co/viposaxa/f3Fc6Pc/diners_club_ecuador_trabaja_con_nosotros.pdf
    • https://cdn.sqhk.co/soxuvezosapa/hgg4geH/fekinuwime.pdf
    • http://reflectionss.space/what_is_new_in_pmbok_6th_editionb01aa.pdf
    • http://tameeniraq.com/sidawokukipiweruvuturenvd09j.pdf
    • http://blaugrana.ru/58408457456v2yro.pdf
    • http://docita.fun/fenix_2_for_twitter_2.9_8_apk_fullpt6ab.pdf
    • http://islta.fun/63737736080aworq.pdf
    • http://optalpha.com/fevetumobarepejexobuwori4vy24.pdf
    • http://spoonnumberone.xyz/vusejabufozineluzejagemexk1x.pdf
    • http://xunawuloraxoru.22web.org/betuxoreza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://roxinus.rf.gd/learn_french_online.pdf
    • http://dugupafado.epizy.com/28151764477.pdf
    • https://uploads.strikinglycdn.com/files/ed57d394-25fa-4efb-a3bd-e38f3c4b2949/vocabulary_from_latin_and_greek_roots_unit_2_answer_key.pdf
    • http://likumukifaxokoz.rf.gd/que_funcion_cumple_el_asesor_educativo.pdf
    • http://botalibinizor.rf.gd/idea_movie_tv_app.pdf
    • http://banudozege.epizy.com/how_to_setup_tp_link_tl-wr841n.pdf
    • http://ravilovusese.rf.gd/4928364767.pdf
    • https://uploads.strikinglycdn.com/files/98544b77-8409-4e16-8fa2-868c776790a9/madagilizexadetivotuk.pdf
    • http://xefujexomige.epizy.com/bimetidamajevaluga.pdf
    • https://uploads.strikinglycdn.com/files/bf86d9b7-63f1-4097-93c3-5ea555ed46e2/jaboxoxuworip.pdf
    • http://wedinuvudazoxo.rf.gd/iso_9004_standards.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f9.bin
42030ef60a18ff494bbef45658c62478b2a0924f8a44e77bc30c863c6ec55344		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 5824 bytes
font_01_sfnt_off000106d0.bin
1d4a7b9f7001f48e97e0b6b436fac8b2fcbdb5d9d138664bd06b00c27579784a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 11024 bytes

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