Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d4aaedf461d776…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 05:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04916f8469ede472c6dd652f9a9de0e2 SHA-1: c3969226a699bd7e392bb5aee6d357f5f7ebf74b SHA-256: 47d4aaedf461d77631a09dc9b71569a8c7960e6bb12a29ceb9fcb5d8252b2bbf
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, presenting itself as a 'business plan sample' to entice users to click on numerous external links, many of which lead to other PDF files hosted on disposable domains. The primary malicious activity appears to be directing users to potentially harmful content or further stages of an attack through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/123?utm_term=business+plan+sample+for+restaurant+pdf PDF link annotation
    • https://cdn.sqhk.co/fixikumeboga/fhcjbEE/bolebobogivebojekiroxo.pdfIn PDF document text
    • http://bositozibab.getenjoyment.net/cello_scales_arpeggios_abrsm_grades_1_5.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/nAOjcha/coloring_pages_for_halloween_pumpkins.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/cQjbDYg/shark_live_wallpaper_apk_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/hggBZge/tafos.pdfIn PDF document text
    • https://cdn.sqhk.co/zobazulibes/ggjiUjb/21332640544.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/sihqjax/lojavubuzemolajekimiwi.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/93306864962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_ca1ec745370a45dca8a69e57caac2355.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/samsung_un65ju7100_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942397c4-a059-4a46-bff6-7080823447a1/gatuvosesofuzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e935ebba-5d34-4c7a-9e51-c62b1239ff54/hp_pavilion_dv6000_screen_price_in_nigeria.pdfIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/lagopuxotapizufewapume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751956f0-422c-4824-9765-8205434f9b06/kotarudij.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/mevitasadinilolo.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_f517121c275f4c5f821f1344e4ec1077.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c660ffe5-e6e6-4fa7-9165-53a8be858ea0/why_cant_narcissists_feel_empathy.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/jumurinezogikir.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_871af27cf2d5456299a3a76f99dd713a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/someone_like_you_adele_live_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/82214321067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e0364e-a7e6-41a3-bb07-16647144b6dd/samsung_grand_prime_price_in_pakistan_2018.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_edfd2af64d33403489a6fed2f808ed87.pdf?index=trueIn 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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5236 bytes
SHA-256: 80209277a133e245fbf326aac4576d2d16035e7b68d164b35634fe6874424118
font_01_sfnt_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 11468 bytes
SHA-256: 2a74445bd9c3b54e62128c2ff0a648f6008a4430e07caf38cfa601616d1838f4

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