Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d298132641b080a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-16 06:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 913f383c3483053d3d3d953c81559316 SHA-1: 0d78bad949011be4f97fc96dd6d1d2742bc4070b SHA-256: 7d298132641b080a41bfe6d705391c6e3bc450df75535b7c35c8663d0cdb4c42
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 are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=pimp+my+vault+android PDF link annotation
    • http://sakesushilakehavasu.com/uploads/files/xadijogiwibebesutegidafar.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/72697799018.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/43245003253.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/61597848645.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/76564183342.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/popaj.pdfIn PDF document text
    • https://alpinashop.bg/files/64258275031.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/74376352525.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/durajep.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614224aa6418d---25219442119.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021091442833_1008089750.pdfIn PDF document text
    • http://drtamerturan.com/file/30250006225.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/nimegitokozeba.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/7855099404.pdfIn PDF document text
    • http://attlas.center/userfiles/file/87275085693.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/90362695638.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/bofulorujaverumuguj.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/98869044695.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210913115050_241032.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cplma0m2tt5ll3f6hc0mq0q13e/muwuxazatiku.pdfIn PDF document text
    • http://carbontuning.ru/file/pawawojuxewevetejir.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/82799552476.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/63988149229.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/labavazanufopirifu.pdfIn PDF document text
    • http://xprchemical.com/upload/files/bazeladenupobam.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_off0000bbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE0 16880 bytes
SHA-256: 708438b6639e1032d87bb29b983de16eaa51248c57a23673ba8370ae909b454f
font_01_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 10536 bytes
SHA-256: 79a5ad5672293f695ebb62a2b75b394ac4be728d94997bdc198f653f109ec7d9