Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b51556968367323…

MALICIOUS

PDF

81.5 KB Created: 2021-04-04 14:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc84e8e9b9b755246f44a577f68ea2cb SHA-1: 7c3c75a1857712813e20f7807be46da87f7cb4dd SHA-256: 9b51556968367323dbf568109de102acd49b4781e811cf2e63d34ca45ae1c6e0
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, many pointing to disposable hosting, and one prominent URL suggests a lure for a 'pirate king hack apk download'. This indicates a phishing or malware distribution attempt.

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://ponafet.ru/wix?keyword=pirate+king+hack+apk+download
    • https://cdn.sqhk.co/livejizilul/fiehgig/expense_form_template_for_small_business.pdf
    • http://fb-ig-violation.com/d__d_market_franklin_avenue_hartford_ctj1se1.pdf
    • http://mini-cam2.club/bellwethers_regular_font_freendery.pdf
    • http://magazinrf.xyz/is_dorian_grey_a_real_personlcomy.pdf
    • http://risimog.mywebcommunity.org/data_analysis_technique_in_qualitative_research.pdf
    • http://detonic-official.website/why_does_my_nespresso_milk_frother_not_workqeexb.pdf
    • http://ogranicbio.fun/vivah_video_song_appsbcmia.pdf
    • https://cdn.sqhk.co/nepajenine/hfgegid/rupal.pdf
    • http://bukuxojunuz.mypressonline.com/in_the_bleak_midwinter_gustav_holst.pdf
    • http://wisecredit.info/ford_explorer_spare_partsf9nm7.pdf
    • https://cdn.sqhk.co/lowanivari/PxTjjO7/kawive.pdf
    • http://vienvozvrat.site/photoshop_shortcut_keys_in_hindiyr2vp.pdf
    • http://pewujok.mypressonline.com/directions_in_sociolinguistics_the_ethnography_of_communication.pdf
    • https://cdn.sqhk.co/nevupediwix/Yhehcig/29050834855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ded5ccb3-ee4b-4640-960d-2a56c8f15849/line_6_reviews.pdf
    • https://s3.amazonaws.com/tugumeb/69995159106.pdf
    • http://namezenidel.onlinewebshop.net/al_arabiyyah_bayna_yadayk_1.pdf
    • https://uploads.strikinglycdn.com/files/30846514-5aba-4ba2-ae33-3ded22540c87/the_history_of_love_book_free_download.pdf
    • http://zavulelobawabi.onlinewebshop.net/76350862003.pdf
    • https://s3.amazonaws.com/simujix/31773116165.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_off0000f755.bin
019f3b8fb39bc69c95433670aa91b4f2bd144a8a882314abfa902ae6e868cfd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 5316 bytes
font_01_sfnt_off00010976.bin
e90c072886aef2015234e54094d6caf05f23def2810af6b94348cb8724b2037c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 19852 bytes

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