Malicious PDF — malware analysis report

Static analysis result for SHA-256 613145615adfebaa…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 19:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 112dc134fac27ddc123a3125a39796a3 SHA-1: b742596966ada2e951334b3518459c2ef57bcaa8 SHA-256: 613145615adfebaa64d230ee5f6326e7063e4205d43b0b75232600b159872c8f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=adult+games+mod PDF link annotation
    • https://gym-rectif.fr/ckfinder/userfiles/files/loxidadajegupenereti.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/81188431906.pdfIn PDF document text
    • http://df-2.de/images/daten/file/wuzanodo.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090917041311.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/13408085035.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/64229824293.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/71401903758.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/65904906215.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/zakar.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/97732565920.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/jutago.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/20647717169.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/f3b4364c845231263c1effab4cb99294/jejunarugopogijuxusuv.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee15737b39---wiragejiralos.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/kokapepazefug.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/96480757449.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/papefi.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/13832282709.pdfIn PDF document text
    • http://stroi-sistema.ru/img/83538205916.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/93750057942.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/pakelozunazasuked.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/pisivemir.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/xivubebibuwitezudakol.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/sebogonepotitutijoxafav.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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 17216 bytes
SHA-256: f98c7e219bbd6aacb7add2f5dcbb357df7766be1c2c86eab79525c2a1b08d3c8
font_02_sfnt_off00011a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 10376 bytes
SHA-256: d0c0ac8f50fe76d9e5cacc9b68e38cb45762580bf0025867e79e46c561db8876

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