Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fa56d57bc8549e…

MALICIOUS

PDF

76.2 KB Created: 2021-04-05 08:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fe947bc0e3a38fffca0cc5e82bb1d8e7 SHA-1: f8c512194730e1c20f3dd7fda7b0e46c4c2d44a7 SHA-256: 59fa56d57bc8549e3bb719117e2370ef59ea58450056090b71be86d0616b6c22
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with many pointing to disposable domains and exhibiting link farm characteristics, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to exploit users by directing them to potentially harmful websites.

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://botokaw.ru/strik?utm_term=ain%2527t+ia+woman+speech+transcript PDF link annotation
    • http://potenciy.xyz/farm_animal_coloring_book3uz39.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://olymptrade.buzz/93943832402gmm4x.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/lunevi6wgdh.pdfIn PDF document text
    • http://euroshopmn.space/829023591110jku6.pdfIn PDF document text
    • http://trells.space/33362202150h34dh.pdfIn PDF document text
    • http://radanews.site/chill_music_playlistjgs6r.pdfIn PDF document text
    • https://fodolirikixubug.weebly.com/uploads/1/3/5/2/135297927/polumojuvit-zixuwaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_60280a5744870.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/7f2df.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/josorinutamot_vumeverodaram_jisoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_6047c13fc9024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_6052fdc7babfd.pdfIn PDF document text
    • http://palitra-cveta.ru/823551976210j0pk.pdfIn PDF document text
    • http://catsism.com/fundamental_rights_in_constitution_of_nepal_2072_in_nepaliul7ph.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dudurat/tabev.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/flight_plane_simulator_3d_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8ad33d-5334-40b7-969f-347b0231c9a7/machine_learning_cheat_sheet_stanford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca1fc5c-8e97-4408-8459-a7e9361a0eec/risizoxegosogame.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/43631972766.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/black_hawk_down_the_untold_story_imdb.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_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 5256 bytes
SHA-256: b6ecfc63d47c33f9c7463bc669581e885f0ca10e3bb9fd31a32b4f3838ffb1c5
font_01_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 10684 bytes
SHA-256: 332de1a1404a54c29f87bcb4fd97facc066a5e6dbd11f99fb171f6e1693f2914

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