Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa87a82d2ce9aa2…

MALICIOUS

PDF

74.4 KB Created: 2021-04-28 21:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c93e18faf9100449ab669f5d5d8bb64 SHA-1: 9372328ddabbb42c786e0a1b35cf60d68c3c2905 SHA-256: bfa87a82d2ce9aa2ea01b4d982b9e4c12ead0fa421eefd2ec45156bb0d879a85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=how+to+end+a+death+penalty+essay PDF link annotation
    • http://chebsvet.ru/tadiwebuxalobewimadazaleljtz3.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/oggqjie/73779222023.pdfIn PDF document text
    • https://cdn.sqhk.co/sivumazudi/jghhggc/bmw_m3_2020_manual.pdfIn PDF document text
    • http://ketadiets.site/blu-_ray_disc_ripper_1._5jph6k.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/maths_formulas_for_class_10_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/ihiohhZ/54615524682.pdfIn PDF document text
    • http://tedewirivotu.iblogger.org/taylor_swift_romeo_and_juliet_lyrics_deutsch.pdfIn PDF document text
    • http://biolinkus.me/816532940029esvo.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/tuwiwoluviwok.pdfIn PDF document text
    • http://noverst.xyz/snowden_cast_membersgj0xq.pdfIn PDF document text
    • http://plsale.pro/vevufevawogofuzurili25epx.pdfIn PDF document text
    • http://memexeti.66ghz.com/catholic_simple_prayer_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegenig.epizy.com/r4_3ds_emulator_for_pc.pdfIn PDF document text
    • http://rerovoxuwalutew.epizy.com/zoxodorexe.pdfIn PDF document text
    • http://degumewo.rf.gd/waminuxav.pdfIn PDF document text
    • http://zezatavaveb.epizy.com/aicc_full_form_in_education.pdfIn PDF document text
    • http://lizuratudesaxop.epizy.com/jasezoxivowov.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_b03b742cb674499284eb3e7e4ca4df4b.pdf?index=trueIn PDF document text
    • http://xosareregaka.epizy.com/melefekajaxexegowemovud.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_72339c6c7e6940e799fb102240c526a4.pdf?index=trueIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_c42305ab81e74b6ea0f61c758a044c72.pdf?index=trueIn PDF document text
    • http://pebimomedunuzux.epizy.com/castlevania_symphony_of_the_night_bat_form.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_dfe8bc14ef124c289132a2947fd267cd.pdf?index=trueIn PDF document text
    • http://zasegusof.epizy.com/calibri_bold_font_ttf_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_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 5108 bytes
SHA-256: 3311fc92967df15d9234676ed153032cb25fe173b0105c8b37063be98abf7dad
font_01_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 9972 bytes
SHA-256: f14592367f967a9988cb82b4a862604b163c96f5b687c7a2d1e2f90a24e5e018

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