Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac07b34b4c8ccba…

MALICIOUS

PDF

78.3 KB Created: 2021-06-01 03:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5de42e5b7a607911924b484d800ffa9c SHA-1: 0cc9f2805116208a43af8964493c5008603cfcc9 SHA-256: 0ac07b34b4c8ccbab944d081e54f59b8bcf6afe69ebb2d1d0575001ed814c6d9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and a suspicious UTM parameter, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/pbw?utm_term=how+to+win+sea+battle+every+time PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412403/normal_5fdf4d5797d5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420934/normal_5fdd87ace7d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_602140fe7d11b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_6019c95a870b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5ffab1e00c820.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
    • https://uploads.strikinglycdn.com/files/8de05a6a-e115-4ca2-9f3e-f977b0ba8e1e/5_fold_ministry_gifts_test.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/f/90623312974.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/download_film_comic_8_casino_king_full_movie_lk21.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144428844/fundamentals_of_management_8th_canadian_edition_free.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144435420/tebavokijip.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144427644/jedeg.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144411744/modunipe.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/20048506274.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/how_to_use_push_to_talk_on_discord_mobile_while_playing_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afd77d4-e036-4f9f-a83f-49f4e44e5fcb/descargar_libro_crepusculo_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fcd54d-9d0b-444b-afc9-7087e27f6a50/nuxekekikilejewudok.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/f/kim_milyoner_olmak_ister_indir_2019_sunucusu.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_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 4972 bytes
SHA-256: 6427e0f38809e1f329f041bae2e5dd66a105891c8c9a38127ec1820885570a05
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 10892 bytes
SHA-256: 8b50534b5afc210fd9ace534ec7de9c7e55c82371f8ca15994ed9ceaa68256b5
font_02_sfnt_off00011dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.