Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2a1dbd0ea52ea4…

MALICIOUS

PDF

78.5 KB Created: 2021-08-27 10:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8a437f93ff3cfb619992f9e94be155b5 SHA-1: b80f641dae7e8af083da571a468b3e9c30db851d SHA-256: 8e2a1dbd0ea52ea4332abf029140bbaa8c1209a7f02dfb360379355439ce0b71
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised domains. The embedded URLs, such as http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16102c0276abb8---85592000866.pdf, are hosted on disposable or compromised infrastructure, reinforcing the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://sushikyototogo.com/uploads/files/58486882166.pdf In PDF document text
    • http://igigeothermal.jp/userfiles/file/garanikadaxar.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/wedenu.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/jesijezexedatamurufasomit.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16102c0276abb8---85592000866.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/851963e92901f2f6ca892ee7588f2522/xazufugobemuvuxivofan.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/195bd54d3c1e2f16e9130d3d1cc68f0a/21391025516.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/44c27f5a72c1d2c673077d2e77bec29a/42768046469.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/64654657090.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/motikoboxosamaju.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/tdpo0u07kuuvqgpt7o17clvmqi/81047957803.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aa91c5d23---30762877723.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/kojupunesurulotigi.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/97063235656.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe78b49dae---7408728505.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ea5ebef4f34cc5af600723086b885518/fatexasal.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/trkc25bg75hepavtjj5tonf5b5/toxalizajosuzutuw.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/vaziruzozozovininaroduzu.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/fugewefofefir.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1610b8a56e0bb4---sotizitebokemisimeganoje.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/99127335834.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/ba7ff01000a38de37eadc345d6231099/89658427377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=stone+hearted+meaningPDF 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_off0000cc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC34 10556 bytes
SHA-256: 9ab4b516d97389bda8b5a190c732c60085be45558377b969625ed5b66ca925ae
font_01_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 17844 bytes
SHA-256: 1eb8e1022f04cd7e0ce3ea2f8592f2e7a82b0175792f7dff5395ebf1024435c5
font_02_sfnt_off0001123b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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