Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04119f37963e1cd…

MALICIOUS

PDF

83.0 KB Created: 2021-03-02 23:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8a27a8d8859e596637239c3213a36d81 SHA-1: 46ab29c349f3de132c6f5cafce17489307dfcbac SHA-256: e04119f37963e1cd2ff53d297367c55859a52361ab5373974adf3be2cf3c6bf8
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain, likely serving as a lure for phishing or malware download. The PDF structure and the presence of external links suggest it's designed to redirect users to potentially harmful content.

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://xajibur.ru/strik?utm_term=words+of+wisdom+for+new+parents+funny PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5fd7c379eceba.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/pipirir.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/2ifhiig/dodimavenusagikid.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/lenovo_y50-70_ram_specs.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/can_you_put_directv_app_on_roku.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/ijbSbQo/boo_2020_lineup.pdfIn PDF document text
    • http://alexsaf.ru/ayodhya_kannada_movie_videosu677m.pdfIn PDF document text
    • http://get3creditscores.info/chakram_jagamanta_kutumbam_video_songsub0pg.pdfIn PDF document text
    • https://cdn.sqhk.co/terupilenu/PwggGij/53788498676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_60104c66b3e6e.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/5uif4hi/break_off_meaning_and_sentence.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5fe30b8914676.pdfIn PDF document text
    • http://bio-ita.fun/kixezatedimugeg151j.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/hiawc91/lazadudojagawejek.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/pinodonor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5fe8b6345daa4.pdfIn PDF document text
    • http://igcopyrightverify.com/21_draw_free_downloadfefse.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/gjLGiam/kepazalawatimipudavadimow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 5360 bytes
SHA-256: 0b2d3bbb3207e3cbfad3ab9b0a0d670d79ce73ac08ae5b29e1e3b7904ff51cc8
font_01_sfnt_off00011860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11860 11376 bytes
SHA-256: 9566a6f97a8a277957dc1427b0d8e0e89a5a553d768fb4216ad21050cd2e4a70

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