Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6fb3d01b4c7580…

MALICIOUS

PDF

90.4 KB Created: 2021-06-01 23:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1d239b27b23e643fb639f91f68a3b600 SHA-1: ab4cddfc5430a20c668870f45999c10612073c4c SHA-256: 4f6fb3d01b4c7580c058b550e8a7a9a8d220eb5418f728c86a5fa82235223a2b
126 Risk Score

Malware Insights

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

The file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/123?utm_term=storyboard+software+android PDF link annotation
    • https://lalupapetawosi.weebly.com/uploads/1/3/2/8/132816164/cbce1.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/vozovebatoxisuvofu.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/4aad33b5ef836.pdfIn PDF document text
    • https://kisupijun.weebly.com/uploads/1/3/7/5/137502160/rotevukug-lipoxes-pewiputiloman.pdfIn PDF document text
    • https://nagaleburanab.weebly.com/uploads/1/3/4/3/134379557/mofulef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_603ba4d950bff.pdfIn PDF document text
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/lomuvosumator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_6010dd43339eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff38e35a65c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xoxafepapesu.pbworks.com/f/ea.com_unable-to-connect_madden_21_pc.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144450072/sovunelagupiveje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c4938d-f6b9-4226-9e59-54e73d6b7cd4/63634123825.pdfIn PDF document text
    • http://xovelezid.pbworks.com/f/nujobusuresukopivurimubu.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/pelizakopalipafukorebase.pdfIn PDF document text
    • http://wuwazilizos.pbworks.com/f/40657105783.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/maharashtra_state_board_7th_std_books_free_download_in_marathi.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144416892/adanga_maru_tamil_movie_download_tamilgun_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d16492-0c0c-48b0-9388-05ad6e46e5a8/evenflo_maestro_booster_car_seat_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8adbe587-b538-4ee0-8633-9577126a31de/77462106743.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144439971/71000814513.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144413754/simple_explanation_of_delegatus_non_potest_delegare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe2cd0a-14b9-401f-9711-241f6ba79331/17774893621.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144474615/79391387691.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_off00011966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11966 5096 bytes
SHA-256: 485306e551b580fccaf0f4d9503ea9db6444954e90a35966d93e1b3967f157d7
font_01_sfnt_off00012ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD0 10276 bytes
SHA-256: 04f19a8926215afe2d62c93bedbadb4a9f10ba03cc397c1cefc6aa353fcae652
font_02_sfnt_off00014e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E06 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2