Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9001c308d8c969…

MALICIOUS

PDF

89.9 KB Created: 2021-03-18 05:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 222a953920d51d2cb72346e66bac5498 SHA-1: 233254e18d8d8b160c0b652e331e02354939a98f SHA-256: 7a9001c308d8c969189e75b7bc452646235f8e857c37d0da828107b15a8a6a1f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to unknown or potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to obscure the true malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=sanding+blocks+lowes PDF link annotation
    • http://titoto.xyz/bazalirupa7494n.pdfIn PDF document text
    • http://herss.space/international_day_calendar_2019jx5ef.pdfIn PDF document text
    • http://detonic-italia.website/77659910977p1znj.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/hgrhu55/1887422162.pdfIn PDF document text
    • http://help-service-support.com/agar._io_mod_apk_2._5._6osu23.pdfIn PDF document text
    • http://rating-bookmaker.ru/project_management_certification_online_university_of_phoenixl3r57.pdfIn PDF document text
    • http://afracheat4.xyz/populao_angolanaufsai.pdfIn PDF document text
    • http://leyloften.online/can_canon_eos_rebel_xti_shoot_videokt5hz.pdfIn PDF document text
    • http://instofficial.online/bomegumenexituxodu5pi.pdfIn PDF document text
    • http://aarbuz.space/ghost_rider_live_wallpaper_free_downloadymhvl.pdfIn PDF document text
    • http://teaitalis.space/dilaziwoflra4o.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/qIq7sgf/96786699985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/972dd1e9-3d4b-4d1f-b483-d4660b79b4c9/94152725447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0404c6c2-4569-4fa8-b55a-6f8aa2ffd9f5/usmle_step_1_score_percentile_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6f8901-2c99-4151-a5a1-8a56efb1a6c7/hush_hush_movie_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fda6ce-858c-4aec-9eba-ec87b9dc93f8/resumen_del_libro_sapo_y_sepo_inseparables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b15135-892c-4bf7-890a-de8231a8d71f/can_you_use_playstation_3_controller_on_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3868e55c-6cca-4947-89f2-8e712aaf516e/the_blue_book_of_grammar_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12b942a-b31c-4520-8e0b-bffbcee7641c/how_to_write_an_essay_about_personal_goals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26786e68-a59f-4493-a9aa-d95b016671f9/nabafaxegaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6e3535-0137-4395-8806-ac9a9c699854/how_to_improve_human_resources_management.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_off00011b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B69 5408 bytes
SHA-256: 74dc1c5cbc6a92d1e289bed72f9b86cd45e8163838c52bdd481cf561fceb5d72
font_01_sfnt_off00012df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF4 12940 bytes
SHA-256: 40d24258e796e3ef4af317ecb262a2cb36d2778fc2ebf5d8b682b367a4cea12a