Malicious PDF — malware analysis report

Static analysis result for SHA-256 2561e2da3e609cb1…

MALICIOUS

PDF

71.7 KB Created: 2021-02-28 07:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0d462ce2a26fb21bb1dd7c9ee8089471 SHA-1: f9ccc8543943ec5ff76c38449c7b1b5345b97f60 SHA-256: 2561e2da3e609cb1bbf644ba6f921256c0e6141da67362bd64a55bd6c2353c11
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=dwarf+fortress+lazy+newb+pack+linux PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476443/normal_60151117d7841.pdfIn PDF document text
    • http://wopivobozas.66ghz.com/apprendre_le_franais_gratuit_pour_debutant.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5fd5f4fd13356.pdfIn PDF document text
    • http://dokojusekorukuf.iblogger.org/25795810438.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/0d2af56.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/bagejokemurovogufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_60247712b3e83.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/ralph_p_grimaldi_discrete_and_combinatorial_mathematics_5th_edition_download.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/gijuwukeziza-nesaro-fifeg-gufokori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_5fce10f96d4ac.pdfIn PDF document text
    • http://widalatipuna.22web.org/batman_arkham_city_lockdown_for_android.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/kifos.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/risitoxe.pdfIn PDF document text
    • https://sixisamut.weebly.com/uploads/1/3/5/3/135308299/f4065b973.pdfIn PDF document text
    • https://zomuguwiremadak.weebly.com/uploads/1/3/1/4/131406071/resejoroju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosaduzunake.myartsonline.com/jifowoxozegobep.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_off0000daf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF5 5524 bytes
SHA-256: 66f7f6689108fc9abe31b6fefdd9b9ef16044c97136fce07b8e0807ce7c40a46
font_01_sfnt_off0000edf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 10520 bytes
SHA-256: 1f00401f1587f5c3a2fea46f31718f1e74f705d828d75e72f01e1b38c7be260d