Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2ece69f658f116…

MALICIOUS

PDF

79.5 KB Created: 2021-03-24 22:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaad9c7deeaa480538ef6c1ac86c7110 SHA-1: b3a6b59c7a972e2fffe5624db415292f381bda10 SHA-256: ec2ece69f658f116c27107c88ca2fa419a416dd8a31cc0b1fc13c81a1181deb3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to redirect users to potentially harmful sites.

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/strik?utm_term=how+to+take+body+measurements+weight+loss
    • https://cdn.sqhk.co/neratimo/HiivaaG/cartoon_defense_4_hacked_everything_unlocked.pdf
    • http://wobufiparezir.medianewsonline.com/pikosuzefarukunegu.pdf
    • https://cdn-cms.f-static.net/uploads/4387226/normal_604894ce45ab9.pdf
    • http://tameenegypt.com/does_rock_band_3_guitar_work_with_ps4i6yf9.pdf
    • https://cdn-cms.f-static.net/uploads/4481819/normal_6024628f4029e.pdf
    • https://cdn-cms.f-static.net/uploads/4421639/normal_600f9e469a258.pdf
    • http://khareedforosh.com/xuximuraluxujerqg9r1.pdf
    • https://cdn.sqhk.co/vukupamita/habSjf1/vokon.pdf
    • http://suvuxivenorum.mypressonline.com/57932250378.pdf
    • https://static.s123-cdn-static.com/uploads/4393029/normal_5ff174122cb1e.pdf
    • http://streamsweets.com/aescripts_elementary_freeem07f.pdf
    • https://cdn.sqhk.co/wagomito/DBgi8gj/video_tube_player_apk_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a9096436-0879-4d19-adad-59a6983b2282/jejafomiguxi.pdf
    • https://uploads.strikinglycdn.com/files/f31abdf9-9b8e-4453-840f-8c7c9a8ba37f/sutilak.pdf
    • http://tefetuzuzip.myartsonline.com/descargar_google_traductor_ingles_espaol_espaol_ingles_gratis.pdf
    • https://s3.amazonaws.com/fipijife/amoled_display_full_form.pdf
    • https://s3.amazonaws.com/levumoduf/88101214770.pdf
    • http://xamukipadu.myartsonline.com/marketing_management_notes_for_bcom.pdf
    • https://uploads.strikinglycdn.com/files/87a9f006-d6f5-4c58-9b12-640475161b78/how_my_body_works_book_series.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/bizowovusimojonunev.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_off0000f83c.bin
e0cd526400e3401037feedf049242e629c4d51aac0fd1bfe8edd5fd5cfc1627f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 5600 bytes
font_01_sfnt_off00010b2f.bin
45e40f1059b2cae9aafb2de9c54c05be356e56ee9aba00bd9ca2e327364f6e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 11080 bytes

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