Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5495da0bd11db5…

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 03:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f118db4275ebecd33251fe7f94d73857 SHA-1: c0e3298d302b2c35e7300fe63b66d0735a0ea0b3 SHA-256: da5495da0bd11db557c3e7b107281b187926e052aee05c6602232b27307bec26
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm, suggesting its primary purpose is to redirect users to potentially harmful external sites. The presence of embedded URLs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://aow.infogestnet.it/ckfinder/userfiles/files/94662630019.pdf In PDF document text
    • https://betalinktech.com/blmedia/file/82380840332.pdfIn PDF document text
    • http://3sdent.com/upload/files/86718585781.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/6e396ec55818c899b28a17561379df0e/25871175071.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/luduredud.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/5809196341.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/50055855450.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/62798318385.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319650ed0b4---rakadafimedapagimo.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/97944278470.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/95946840812.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68686277494.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/27467015945.pdfIn PDF document text
    • http://origo.ws/userfiles/file/lajivumofuzikinurubitif.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/kenirupuduk.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/rafekera.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/dolubokabedurarukomor.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/73100896561.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/65246976158.pdfIn PDF document text
    • http://rayanchem.com/d/files/97257308301.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/1563051921.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/nivegekusafasavarijixipik.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/39555944644.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/94466993273.pdfIn PDF document text
    • http://autodilygood.cz/files/file/49689447356.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=csr+racing+2+hacked+apkPDF 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_off0000e233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 10772 bytes
SHA-256: 4a47efb06f560b4c8acd3c8aedb27c678837f244d20dcc4c0452235eea0d0049
font_02_sfnt_off000112d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D7 18020 bytes
SHA-256: 39ec6dd53d68119ee924e1e4215263395b638e583ad8fad8d6720cf352598f5d