Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3ca50267a16ac2…

MALICIOUS

PDF

75.2 KB Created: 2021-09-20 12:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 673fbe200735d3fe6b246b6e3b5884c6 SHA-1: 16508ea103bd366a544ff697af4434339a838111 SHA-256: ed3ca50267a16ac21e12c896d9717b1fbd01206687f5cd0ded3e75bdb72aef00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as containing a link farm hosted on compromised WordPress sites, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous links to potentially compromised domains points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363db6785b9---mupaneril.pdf In PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210908_8D4E2408F294AD73.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/46305888247.pdfIn PDF document text
    • http://www.andreapondika.cz/file/68895712815.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/xugoputujezepivonas.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab279d82a9---teloguruwaxilabiweregerat.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/wapixifegegifone.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/2573139194.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109041748455789.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/68889108684.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133275963fff---36882295462.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/20219181416298697.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/45664372966.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/nasorotiguxelatonadiwonu.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/26362593898.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/tedenowidalufele.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/45479168333.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/kipiseweditizujufenu.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/90724486035.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/pogoruxovadexav.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/lotimexekatiwixiba.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbcf5988d4---45866831479.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/96964109002.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=aplikasi+edit+video+aesthetic+di+androidPDF 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_off0000c1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 17456 bytes
SHA-256: 8db8223349d9210fc36c2d6e5493a635f3f86e381ec831f9af24138292bce5d9
font_02_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 10752 bytes
SHA-256: fe6d46a7868a47350d49b3a388bc201af00a6840a1fea8c0ba7a28af6fbaf529

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