Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec56eef026e8716…

MALICIOUS

PDF

68.9 KB Created: 2021-06-01 01:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 80976b49edf93aacc34106dcc7dc9537 SHA-1: e84de70a24fc3ba5a7f08b4aab89eee7993c2d7a SHA-256: 2ec56eef026e871687556035e7a307e5dc92a883520571b547b45dd05a3d4ce1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a common tactic to drive traffic to attacker-controlled domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/123?utm_term=beginners+guide+java+pdf PDF link annotation
    • https://gazolono.weebly.com/uploads/1/3/4/7/134721713/pelawives-gaxeraza-gopave-givarizaxu.pdfIn PDF document text
    • https://butabapob.weebly.com/uploads/1/3/4/7/134744569/ladewufuri-madibuxafef-fogiredev-lumibo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144428868/bidofozuwetomibunibidim.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144428694/kigonibikibizabopusi.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144417213/mowovufubepepar.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/f/how_do_i_reset_my_pioneer_bluetooth_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81af93d1-0877-44e2-87eb-549bff939f82/fugum.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144416799/52664722379.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/la_la_land_main_theme_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4c42c2-3738-4788-8e09-bbe54501d8f1/gituzubedizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9e3643-3fd1-415a-9416-82b607e85577/melolad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8c4b7c-bf80-45fb-8107-86330bbf77cf/manorama_year_book_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a1616f-3d46-441e-91a2-6a0d5b7dc781/98201779243.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144428334/22_hp_briggs_and_stratton_intek_v_twin_engine_reviews.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/67430409465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f5fa33b-0888-4cf7-bad7-0ec54f059b20/tcnicas_e_instrumentos_para_la_recoleccin_de_datos_cuantitativos.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/manudoxawuwuso.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_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 5360 bytes
SHA-256: 739e76b9fbb042cc8e754e3311ff516dce799c544bde6b379ceb13d95385d6b7
font_01_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 9876 bytes
SHA-256: ee3dbbfd0263e2f04dd9f7aacd4a343f94cf961f6b6577a8b7c023d702a320f5

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