Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6ea19ab743e884…

MALICIOUS

PDF

78.8 KB Created: 2021-04-15 16:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: beab6341b9a33ec270e16ca693d8458c SHA-1: d7ddf3410ab318ec17fff83f0d93cb5fc854c38a SHA-256: ce6ea19ab743e884a86e881918d6406c9fcfe14a8983f354c364036fd4e55c8a
66 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded URLs, many of which point to disposable hosting or potentially malicious domains. The ML classifier strongly flagged this PDF as malicious, and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm. While no scripts were extracted, the sheer volume and nature of the URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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=when+you+love+someone+lyrics+lukas+graham+meaning PDF link annotation
    • http://pelinebaj.mypressonline.com/74599071820.pdfIn PDF document text
    • http://unlockdeals.shop/learn_english_speaking_online_india_freeed0jh.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/lifenula.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/trigonometric_equations_sin_cos_tan.pdfIn PDF document text
    • http://natalonofawoba.22web.org/does_bullseye_trades_work.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/graphic_design_courses_online_uk_free.pdfIn PDF document text
    • http://medyayazilimtr.com/new_testament_books_in_chronological_order_catholiceojsj.pdfIn PDF document text
    • http://the-job.ru/nasa_asteroid_warning_november_2020fj3nc.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/kazosez.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/3645662330.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/uses_of_computer_networks_download.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/facf3242-dd9a-4e0b-ab15-a0b1ba14efe4/82916745266.pdfIn PDF document text
    • http://divejekojo.epizy.com/jenavomaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79af2f57-7aa4-49c7-9dbd-9e3122f68baf/82674157182.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_b3cb50f678da4262b08380050e1a6df4.pdf?index=trueIn PDF document text
    • http://detuxidamuw.rf.gd/zumotazuj.pdfIn PDF document text
    • https://20e8ec16-a7ca-487e-906f-4b2d5c2744e2.filesusr.com/ugd/ab81b8_25f61b8499664b748df7eb540f279340.pdf?index=trueIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_62cdeb7b27ae4dddbd5fad363342c40c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fb3bcf-b309-4529-8c52-ddf594626369/pimavopubotibetiwo.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/fivoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f38a7ea-3f23-4546-b571-53f52bc917d1/araby_james_joyce_audio.pdfIn PDF document text
    • http://dozewejesan.epizy.com/les_lois_organiques_des_collectivits_territoriales_au_maroc.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_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 5252 bytes
SHA-256: f7903c5c90464d2039f8258a0ad766d7432aa24c9ac36ade32cfeeca0540bf2d
font_01_sfnt_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 13136 bytes
SHA-256: b5a4294d20092f901b14f85c9d533917c89b001cdbf89374087fc7538da2d33d
font_02_sfnt_off00012029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12029 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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