Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feeb73b141947d8…

MALICIOUS

PDF

96.2 KB Created: 2021-09-20 09:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccb40e266f1a5eb3f019d980655e522a SHA-1: ac278d22953a9e36a5e26e665c22543b1bf27028 SHA-256: 8feeb73b141947d84c44570f8bebd183c0dde3fbcb07cd2f2e427d0992947faa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing sites or download further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the true destination through a network of disposable links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 5

  • 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.
  • 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://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/5b6ca6b11cfa694b0247947bf93064d9/tokemowugiwixo.pdf In PDF document text
    • http://hightopeducation.com/cms_uploaded/file/93145058063.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/11312365676.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/17656924732.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/wonalunutizoju.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/74524351895.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/97521088028.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/nevafuzes.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/rugurazasejozekave.pdfIn PDF document text
    • https://semut73.com/contents/files/vupenak.pdfIn PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/2989638503.pdfIn PDF document text
    • https://kaparatt.com/images/File/nigetux.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/72309457027.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/fuwifig.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/rumabinew.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/wogivivesonagogoberazagi.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/nezipemuzuke.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109130744512309.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/73437893360.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/84876754382.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/79292154209.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/bisotomilozajonizu.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/19913355693.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/37bfdd6e5c514cd4c04d27b01c90441b/moxufukixirova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+wind+up+bird+chronicle+pdfPDF link annotation
    • 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_off00011088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 19932 bytes
SHA-256: db1d4ca0ae2d84aa61a99a46861c7c5601bcdef5ecd1d03c6f51c9b93aeec100
font_01_sfnt_off000144c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDF 10576 bytes
SHA-256: 04816c29776588e614f6b51ed8bbe947389d938c447b67ef38d6ed2068c70f4f

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