Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a90214114fb438…

MALICIOUS

PDF

85.5 KB Created: 2021-03-19 18:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d20edf9c003a5275e29f780e5570b5f SHA-1: 51dd72b2395a0cb6868112d9deb1cd8b85c55ee6 SHA-256: 65a90214114fb4388cbbd5e37031cb239b8ce6d9c238a93fe8f41900ca7182ca
166 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many with UTM parameters, characteristic of phishing or spam campaigns. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document's intent to trick users into believing they need a password for an archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to deliver a malicious payload, likely through a secondary download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/123?utm_term=border+bootstrap+form
    • http://tezoxefakalexo.sportsontheweb.net/what_is_enlightenment_kant.pdf
    • http://vitofemegawe.getenjoyment.net/four_color_personality_test.pdf
    • https://cdn-cms.f-static.net/uploads/4390055/normal_6021895db68e8.pdf
    • https://cdn.sqhk.co/jotepomi/82hfhhd/armageddon_movie_song_list.pdf
    • http://bukobaxaz.getenjoyment.net/merits_and_demerits_of_vedic_education.pdf
    • http://newuwedeza.mypressonline.com/how_to_use_crane_drop_humidifier.pdf
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/2129209.pdf
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/dedunus.pdf
    • https://cdn.sqhk.co/lagidexetin/gdPhd52/samurai_jack_season_5_wallpaper_hd.pdf
    • http://koreanluxe.com/afrikaans_language_notes5if57.pdf
    • http://hamsterbig.com/zodosinoxba870.pdf
    • https://cdn.sqhk.co/japivuwali/d78ifGg/88200490567.pdf
    • https://zadopuvaja.weebly.com/uploads/1/3/4/8/134892734/86ded43ab10a.pdf
    • http://j3vnci4.xyz/image_translate_appdtvl5.pdf
    • https://cdn.sqhk.co/kofosenolo/h1tgdzU/acer_aspire_4752_drivers.pdf
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5feb7c896068f.pdf
    • https://static.s123-cdn-static.com/uploads/4447906/normal_600244d37bbd9.pdf
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5ff55085a4cab.pdf
    • http://accueilcmb.com/game_launcher_download_apkpjd05.pdf
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fda31d68709a.pdf
    • https://zivibesojosilit.weebly.com/uploads/1/3/5/3/135304262/2770497.pdf
    • https://cdn.sqhk.co/malofavu/iCjcidm/jewelu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5c54d0bb-9de8-469b-abb1-33232a952ba9.filesusr.com/ugd/370e3f_e91e7b3eb72c4b05b2fb99eb2a095898.pdf?index=true
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_3829ddd3c0df4c5fb36c92248991435d.pdf?index=true
    • 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_off00010da8.bin
3f30b303d2294af4946b61a362977e90f2b03613c39bc306dea681aa77283ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA8 5344 bytes
font_01_sfnt_off00011fb8.bin
d3b5650153d7764ad8ed314d06a92c1a66369ce7b05885be91eb96025005440f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB8 12148 bytes

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