Malicious PDF — malware analysis report

Static analysis result for SHA-256 998224799faef11f…

MALICIOUS

PDF

74.6 KB Created: 2021-06-12 14:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35c40df8244ec41fe4947869c1252912 SHA-1: 6cfe0e75c79022139a977ef9eb36d085478812b2 SHA-256: 998224799faef11f0887b80e0c330c610b8ab4045b5b2d3dc279e9d53fb00b93
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one pointing to 'https://xezojetit.ru/123?utm_term=bal+krishna+photo', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, further supporting the malicious intent.

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://xezojetit.ru/123?utm_term=bal+krishna+photo
    • https://cdn-cms.f-static.net/uploads/4390637/normal_605f5267254f1.pdf
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/73dc331f.pdf
    • https://jawimuxuketeg.weebly.com/uploads/1/3/4/7/134763527/tusonowaw.pdf
    • https://jezelide.weebly.com/uploads/1/3/0/8/130874318/bbdf3.pdf
    • https://foxanebipukete.weebly.com/uploads/1/3/4/3/134309218/2035500.pdf
    • https://cdn-cms.f-static.net/uploads/4411512/normal_60bd97cc5e099.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kuperuxowix.pbworks.com/w/file/fetch/144539547/vagepedowovopoxumireloni.pdf
    • http://fobimexus.pbworks.com/w/file/fetch/144885930/best_god_of_war_game_for_psp.pdf
    • https://uploads.strikinglycdn.com/files/8a84a97a-5b22-428c-b1e7-14dbfb52262b/albert_camus_myth_of_sisyphus_analysis.pdf
    • http://womelilare.pbworks.com/f/my_hero_academia_season_2_episode_1_dub.pdf
    • https://uploads.strikinglycdn.com/files/ab65dbe4-9371-423a-8217-6deb0e8f03ba/75575330413.pdf
    • http://fotikeralo.pbworks.com/f/gubiwikefezuzanib.pdf
    • http://mapijakemifo.pbworks.com/w/file/fetch/144637332/does_astro_a50_work_with_ps5.pdf
    • http://siwunugilul.pbworks.com/f/brighter_grammar_book_5_free_download.pdf
    • https://uploads.strikinglycdn.com/files/d7a40875-cb1c-4d81-b164-7d1ded9f1c50/tutapagaxijosavavipad.pdf
    • http://kusarolox.pbworks.com/f/xuribamexijegupugevovo.pdf
    • http://vamafob.pbworks.com/w/file/fetch/144647568/2292375625.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_off0000e9b4.bin
662bf1f60025a45af8dfcae16ecfd96e424dd050528ccbb4876c7e7485bb7ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 5020 bytes
font_01_sfnt_off0000fac0.bin
bbb9aa4b2b8cbe368677c3cf38526312ef764d7fcf0adb107b88605326d9f702		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 10176 bytes

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