Malicious PDF — malware analysis report

Static analysis result for SHA-256 929b9a57de70de69…

MALICIOUS

PDF

84.5 KB Created: 2021-03-16 18:28:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f127759b59a6b68bd1e254d45cd1ac SHA-1: 9e5767eba5e21840ff11bef52e65bc54cef4b951 SHA-256: 929b9a57de70de691bc9947b6711f0730442ac836ada73675255292da771b4d8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=how+to+spell+hebrew+in+hebrew
    • https://kukutapiroboj.weebly.com/uploads/1/3/4/7/134712573/6615230.pdf
    • https://bawovaleza.weebly.com/uploads/1/3/2/6/132683088/0205584fe2.pdf
    • http://lokubakodo.getenjoyment.net/gudeziwujadudus.pdf
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/269a5f778b04.pdf
    • https://cdn-cms.f-static.net/uploads/4447497/normal_603e089858750.pdf
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/3086677.pdf
    • http://jepisafidezegun.scienceontheweb.net/zakepogagekudowakisukip.pdf
    • https://static.s123-cdn-static.com/uploads/4494147/normal_5fca9207c718f.pdf
    • https://kuwuxegizeduki.weebly.com/uploads/1/3/2/6/132695805/53a6659ce0d3.pdf
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/rezetejo.pdf
    • https://static.s123-cdn-static.com/uploads/4388177/normal_5fca3104204fe.pdf
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/ee20e1.pdf
    • https://pabafuneb.weebly.com/uploads/1/3/1/6/131607185/b9daa9.pdf
    • http://rejamar.sportsontheweb.net/domipureminaduxejiwa.pdf
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd242d49788d.pdf
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/3449823.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xijuxosisomuna/lenufugafunad.pdf
    • https://s3.amazonaws.com/nonipesikiri/please_answer_my_call_in_japanese.pdf
    • https://uploads.strikinglycdn.com/files/2343556a-9f15-4a04-8118-05532f8e0298/getting_started_with_spring_framework_covers_spring_5_free_download.pdf
    • https://s3.amazonaws.com/dobesogum/ansys_spaceclaim_user_guide.pdf
    • https://s3.amazonaws.com/kezemiradigu/upsc_cds_1_2020_notification.pdf
    • https://uploads.strikinglycdn.com/files/a2e421a2-17a2-4525-8c86-f8798fefe0e2/como_hacer_una_receta_de_cocina_en_ingles.pdf
    • https://s3.amazonaws.com/vapite/t_shirt_design_template_black.pdf
    • http://ziwemasux.myartsonline.com/primal_branding_patrick_hanlon.pdf
    • https://uploads.strikinglycdn.com/files/d097fa59-3a46-410e-914f-98e8098172cb/what_does_plot_diagram_mean.pdf
    • https://uploads.strikinglycdn.com/files/f0ba6566-2968-4406-ba4e-018a3500bf9e/59882856413.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a5.bin
cd75941e1947901ce85dc246829e5663eb2e621fe0b91cca6f769f92ac7dc9b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 4676 bytes
font_01_sfnt_off0001107d.bin
555f208a07df28e565aacb98c8bb0d20234651ea8bccfaa183e355b164218d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1107D 10980 bytes
font_02_sfnt_off000135c2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 4324 bytes

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