Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46fffaa4085b75b…

MALICIOUS

PDF

79.1 KB Created: 2021-06-10 02:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7f17c8432c8fef916d2ed5431b4a6c35 SHA-1: aa71dde3c8dd63ee297edc3ad1122d644129a124 SHA-256: b46fffaa4085b75ba2af8bd07506566fc2bebf0ea107b7dd1f2c957be7a692d6
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary focus on a URL hosted on disposable infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=local+tour+guide+japan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465538/normal_6025078c8aca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_60597e433804a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491159/normal_5ffd73c15c9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fe8aad093cb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_602d0f986c7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_601be37dd1339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexibitite.pbworks.com/f/bleach_vs_naruto_3.2_apk.pdfIn PDF document text
    • http://nibenaxibot.pbworks.com/f/download_grand_theft_auto_vice_city_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd8e1b6-1068-4c54-9a6e-c0bb7ff268de/71019801671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9002e4cd-ce7b-4d83-a868-a36fb9d29884/97359866813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ac70f7-095d-4ff7-9789-47077ed44ea6/twilight_2_full_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • http://kibarilotog.pbworks.com/w/file/fetch/145000929/61744804780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6206fcdf-d534-4296-8d80-3d97a5fb8ebf/kaposa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d21d838-5658-43f2-b3b4-a4b3b0f8b1e4/miluxivexeripi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2319a5-cc37-4511-8fb9-2d5938ad7753/dantes_inferno_gameplay_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafdabf3-3e46-4ca4-8155-ea7c5c7ff63b/87205852278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0f213a-db19-49a6-bb89-2fed9f976730/56791672953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/116a7a5e-739e-4689-890d-e2e7ecef668a/molojo.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144822126/corel_draw_x8_portable_espaol_64_bits_crackeado.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144625551/what_information_is_included_in_a_project_charter_agile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d444df-0986-49bb-aeb5-d0e79d4402df/why_do_you_think_it_is_important_to_recycle_paper_towels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc487d1-60f5-443d-9b05-34cba7a2cbaa/2015_honda_accord_coupe_exl_owners_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 4304 bytes
SHA-256: 40da9efcbfb87eb4c7a4cc779619c6af065c1a47e0f607c938d859758a5806e9
font_01_sfnt_off0000f685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 5080 bytes
SHA-256: 994ff28639c9e95fd015597cc1b729c874605d30781dedaca4e5bfd8e97cd644
font_02_sfnt_off000107e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 11960 bytes
SHA-256: 8bd575ef59084c1b17b3f3c0ddab51d1a3edf0550fa9306163166ae6b42d2210