Malicious PDF — malware analysis report

Static analysis result for SHA-256 14444ab4c0bb98e4…

MALICIOUS

PDF

68.6 KB Created: 2021-09-27 16:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d8c3bffbf099269aa8caa72840c29d0e SHA-1: 108aa9bad5fb1ea2ee4ba5874af4b1aa24ad5eb6 SHA-256: 14444ab4c0bb98e40b7b4145097defcca4596c582ddb7c972d291a1aaa328e6e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to malicious sites. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=walking+dead+full+apk PDF link annotation
    • https://aaaxxion.info/images/file/teviluf.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/48379400237.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/tamisemewurafekoxegajo.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109090025108129.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/vabuzufadug.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/safubanup.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021092720034490.pdfIn PDF document text
    • https://iohrp.org/f_files/files/32785846285.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/dexut.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/kufozodubijizavu.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/senakusipolapujejawizafut.pdfIn PDF document text
    • http://wdnederland.nl/file/mexoforimutudogadapufil.pdfIn PDF document text
    • http://soc-in.com/data/media/files/6144557023.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/jizanu.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/13869804342.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/75925302532.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b3cce8a1a76f81818667126ddc2c9177/dikobutekige.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/66060846151.pdfIn PDF document text
    • https://ms02bet.com/contents/files/29859757772.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/jupokuvolevalade.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/bikevuzewevifipi.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/63520331492.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tofimowasopolozib.pdfIn PDF document text
    • http://apsons.eu/files/file/4257425867.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_off0000afa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA4 15048 bytes
SHA-256: 7c3a272c13ff7049d83e4461d3accf0edf4be2e4317ae9808cdb1479abe532fc
font_01_sfnt_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 10372 bytes
SHA-256: f323504743b81e5cb07116b26297204135c3b484308009ec2a4dbe7e16560ee9
font_02_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1