Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c74bad25fb1545…

MALICIOUS

PDF

72.1 KB Created: 2021-03-10 03:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0dd87e23a11d8ea28f4943f02a543ac9 SHA-1: 248cb1963393fb37033a59daf6509ecd1f3cba1a SHA-256: 65c74bad25fb15458e96014c6af554fc77f5757517bbb2322d83203c1ac43d3e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used to redirect users to malicious websites for phishing or to download further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'CLAMAV_DETECTION' confirms malicious content. While no scripts were explicitly extracted, the presence of many external URLs suggests an intent to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/123?utm_term=gerund+worksheets+pdf PDF link annotation
    • http://clubstore.info/lean_analytics_espaol_gratis_descargarymi18.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/how_to_crack_steam_games_2019.pdfIn PDF document text
    • https://ledugatikafaf.weebly.com/uploads/1/3/4/6/134693541/begataf.pdfIn PDF document text
    • http://my-favshopf.online/43147022712b4pjs.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/jewunogiserujovi.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/11051209025.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/5715362.pdfIn PDF document text
    • http://alcexpress1.xyz/humminbird_helix_5_si_gps_owners_manualbucqu.pdfIn PDF document text
    • http://winoraama.site/dotozidelevugal0n4y.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/how_do_i_connect_my_verizon_wifi_extender_to_my_router.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/gixawetopoli/86504071788.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_200c9737589543bbb1d3100166ebbd50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/xafujifazixenujisosubob.pdfIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_be75963f727c4e9492dd01daad1ab510.pdf?index=trueIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_148cd5b72fa246ebbacbb5040168948d.pdf?index=trueIn PDF document text
    • http://sabiwilurase.atwebpages.com/zitibebuborutirepenotesu.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/wokuketu.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/pandoc_convert_latex_to.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_off0000dba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 5076 bytes
SHA-256: f29ab0c3085ff94dbaa5633c4ecf9060c8c5da327f29de3d4a6af06573759ee6
font_01_sfnt_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 10904 bytes
SHA-256: 40f9f49eaf54fadd7b4630b84fbef01d579beccc2b80b4c07994f58a3e9c6c78

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