Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d4d7626cbf7381…

MALICIOUS

PDF

81.1 KB Created: 2021-09-09 04:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 709d259b5aac72570578106f5ed7e15c SHA-1: c3ca2bc612fa6838ababce0984dde3cf5cef1888 SHA-256: 46d4d7626cbf7381f75e41136fdbd8a6c243fec515ef53b5bfa5b24b4903c7bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://coretry.ru/uplcv?utm_term=aplikasi+video+slow+motion+untuk+android PDF link annotation
    • http://oawebserver.com/piceditor/file/zazanuvamuzafopusoki.pdfIn PDF document text
    • http://lagrupacio.cat/file/powom.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/60369725984.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/nibimotuwo.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43378879486.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613180e860bce---keduxuburavesamagi.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/63182907364.pdfIn PDF document text
    • http://nut-shell.net/upload/files/dewedadenadexasex.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/baxabozizolisuxoverisow.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135094a2627e---56274557410.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/090547542241.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/82000269594.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/numobanitotidenolad.pdfIn PDF document text
    • http://ifap.it/images/file/2145689562.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/84492505859.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/58959978967.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/11497597992.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/xojosimilugu.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/fubuxedejesuk.pdfIn PDF document text
    • http://hydrem.ru/images/file/78119743318.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/mojovinugemuvarebibopafi.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/joxubaz.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_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 18048 bytes
SHA-256: 03bdb0c045dad2393aeb9e84b2c9ec9785a050c477e8c65a7da92475bdcafa18
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 10876 bytes
SHA-256: 2fad20ecd94f5436f3858655d6d3a3943bd9689b549bbf85a79d3152e28f54e3
font_02_sfnt_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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