Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45fd2de1adb79be…

MALICIOUS

PDF

86.1 KB Created: 2021-09-10 20:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d7ff015db484aad1b913197dc13f527c SHA-1: 4d38bf6d106ce5c02a687183dac4927a0bb1698c SHA-256: c45fd2de1adb79be135e987ed8fbedb2a7ddde8b5922b62dbce52c070a097539
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

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=crear+juegos+para+android+sin+saber+programar PDF link annotation
    • https://ventadeterrenosurbanos.com/userfiles/file/66695879267.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/wipinomavave.pdfIn PDF document text
    • https://ayurmitra.com/files/file/24079428645.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/28369422269.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/36195811973.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/c3e43868cd21e42e386035c12027bb30/zofabatanakafimo.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/sudimejekita.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/34953631296.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/zefalovadeg.pdfIn PDF document text
    • http://orderkai.com/uploads/files/joxujabuzelovixupi.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/vorasewu.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/najawenutup.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e1ad45325---61827598042.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/tibikev.pdfIn PDF document text
    • https://klcconsulting.eu/klc/file/vezotuwefizuvoka.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/99479303896.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/3215378845.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1630930806swk7.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/dugijosogotuxudojutij.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/80410880308.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/xabibusafiperufu.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/91100199250.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/71930067507.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/revobevusopubodut.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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 20152 bytes
SHA-256: 2ce110814820e6da9592c3e7b842518ef24a573ebd361ef3c3d6164fd8851ce0
font_02_sfnt_off00012fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE1 10992 bytes
SHA-256: a05b9838f2c5d7ced09b1cff394207c05ba05e1913e584bc3f15fc27c45b4eaa

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