Malicious PDF — malware analysis report

Static analysis result for SHA-256 adeaae094d744859…

MALICIOUS

PDF

72.2 KB Created: 2021-06-02 08:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1fa0baac9e02103ce0c5d682aaaeae SHA-1: ac5670a926b49756fbdb0af0dd748a2d3787ceb0 SHA-256: adeaae094d7448596ea421693e80668cd690134f42f01bf924bdaf0cb8c6c5b2
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to 'https://philabc.ru/pbw?utm_term=datepicker+angular+format+date', which is indicative of a phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests this PDF is part of a link farm designed to redirect users to potentially malicious sites. Although no scripts were explicitly extracted, the presence of embedded URIs and the ML classification strongly suggest malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/pbw?utm_term=datepicker+angular+format+date
    • https://cdn-cms.f-static.net/uploads/4422643/normal_5fd93c93e9e6b.pdf
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fff5b56611ca.pdf
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/sabopejavaxa.pdf
    • https://static.s123-cdn-static.com/uploads/4527237/normal_5fe3a3366dba4.pdf
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/verusitiw_buwadu_waterupale_wodujovas.pdf
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/kuriluwufu.pdf
    • https://pemesekisubabas.weebly.com/uploads/1/3/4/6/134659876/siginalu.pdf
    • https://lukumupanulafaz.weebly.com/uploads/1/3/4/6/134683212/xeronika.pdf
    • https://rakuwogu.weebly.com/uploads/1/3/4/8/134858672/xeweturonujaxuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424038/crew_member_job_description_for_resume.pdf
    • http://kufujibumufa.pbworks.com/f/how_old_is_samsung_galaxy_grand_prime.pdf
    • https://uploads.strikinglycdn.com/files/c627be3d-79b2-4601-a7bf-1f08fd78fe55/what_is_the_summary_of_the_hunger_games_catching_fire.pdf
    • http://xovakovawup.pbworks.com/f/75113996098.pdf
    • http://lekuzax.pbworks.com/f/what_is_psychoanalytic_theory_of_personality.pdf
    • https://uploads.strikinglycdn.com/files/180e6309-4f12-47fa-aad9-26dbc62acf15/how_to_fix_kyocera_printer_offline.pdf
    • http://zepupifob.pbworks.com/f/19324251309.pdf
    • http://supatibu.pbworks.com/f/apache_max_log_file_size.pdf
    • http://betosaxugawi.pbworks.com/f/jivezolofanejetuwabufuwu.pdf
    • https://uploads.strikinglycdn.com/files/54641b56-377b-4fac-b831-590f3b8c75c8/have_yourself_a_merry_little_christmas_michael_buble_lyrics_youtube.pdf
    • http://mefijunov.pbworks.com/f/wovumazetovexobebigidar.pdf
    • http://wiliser.pbworks.com/f/pelukilezoxositefu.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_off0000d934.bin
2de428ead02b0d1dc24ef388e169deb3fd2d1ba91316a6e66b97f0c654b3422e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 5360 bytes
font_01_sfnt_off0000eb6a.bin
aa2174f589294f004c777fc2092547054db6c81f118d33bb21aa97aaf741da65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 11208 bytes

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