Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b15a54a78caaa8…

MALICIOUS

PDF

90.8 KB Created: 2021-07-30 05:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 62774bc75fc172c90c254c212520add7 SHA-1: e347ccdb7f82b456dcb1bf06b7e5b775e11ea311 SHA-256: 60b15a54a78caaa833c53bc7165bfac4665275cc3ca5f7e942b265a960d5f524
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://at2apigroup3.com/contents//files/18153655306.pdf In PDF document text
    • https://harkakotony.hu/UserFiles/file/70707372541.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81dd98e213---85387245039.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/90682247840.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/guzafudejilufuzo.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/jiledibajumifaku.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608aae0c1e432---67834232758.pdfIn PDF document text
    • http://emannsltd.com/userfiles/jotati.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/4816d610116dee0871879f88c8381961/56510080845.pdfIn PDF document text
    • http://potlista.com/file/files/modozemasapifavamav.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/wuwakokogajoforur.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/78890568614.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/ee614d42384bdb0e966491667a670c3b/93783463461.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/v8itn3gm9r6kn77t4u27edub21/poken.pdfIn PDF document text
    • http://soupworld.de/upload/file/54847283287.pdfIn PDF document text
    • http://geraldkleinlaw.com/ckfinder/userfiles/files/busuxefovemogumos.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084022eb4dd0---ruzititapagexurokevupos.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/51a11c10422fb1fb09016ccef913a5b6/4694452591.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29f7c10ee---25411022752.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/dogoxulepirezuvujubizanav.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d3920f59d---fowofafatofaw.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083ab3ba7907---13974959207.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/lovetido.pdfIn PDF document text
    • http://cosyromania.com/media/file/nowefiwopudonise.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/67238346221.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/fasekakixiladedajomusazid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lords+mobile+codes+april+2020PDF link annotation
    • 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_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 10812 bytes
SHA-256: 5772d51e362cfa6ada4141fc10ddd1ecf50a46740aa62f322537802ba45aec4a
font_01_sfnt_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 18280 bytes
SHA-256: 921c6058331ce9539f88610a4e3d637c778ae3b3b766a0c8d997daa2b4a708b8
font_02_sfnt_off000143b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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