Malicious PDF — malware analysis report

Static analysis result for SHA-256 60820aea0e90a59b…

MALICIOUS

PDF

72.8 KB Created: 2021-09-20 10:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6bddb15a3daeb56b3962679b375f9cb6 SHA-1: a180fa0f316b457110bacae8629c3d7a26244a98 SHA-256: 60820aea0e90a59bbde97d983603c4b5379f9d4e24fd25555fa041ea51f56847
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and the numerous external URIs suggest a link farm designed to host or distribute malware. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=hanuman+chalisa+bajrang+baan+sankat+mochan+pdf+download PDF link annotation
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/bprknk95agj8kg8n1uhpttdf16/takazoxopulebu.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/87782303804.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/53949842994.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/5456589540.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021091713433_523140403.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/60198116297.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/55179016707.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/64721494433.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/kotipixajuzen.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/wuvugok.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/fojosoki.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/nulovolijuta.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/32953921426.pdfIn PDF document text
    • https://medpressa.ru/files/file/ramusubo.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/najodezusu.pdfIn PDF document text
    • https://vendax.ro/files/file/mulim.pdfIn PDF document text
    • https://12shio2.com/contents/files/kurilopejejo.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/wawen.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/74070331896.pdfIn PDF document text
    • http://vce34.ru/attachments/file/43560172917.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/a54dfe9525894a2a7f1670204ba51b28/70064756195.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/tipugizotezevakal.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/72035836106.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/teviparovilunavate.pdfIn PDF document text
    • http://space-edge.com/upload/files/riminososaxibobeviwotobu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB565 17288 bytes
SHA-256: 2478940933b8cfd0e04899a36cb8e5975598947e2fd8712193bfd08031bdb2e3
font_01_sfnt_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 11472 bytes
SHA-256: e8f523992ce585315e543882f944dda13adf11dcd99f492ef174bf695616e4ab
font_02_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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