Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff02dd3d77fa51b…

MALICIOUS

PDF

76.4 KB Created: 2021-09-04 09:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a91e0c4a1c7a22e4cfd0ab9affce5a41 SHA-1: 71577fe70de3131a4ad18eece5e8c8592f5e6097 SHA-256: aff02dd3d77fa51b9d305e4f272639d8b695025575040339cf1963753b992c1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt, potentially using embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/dtdgs64spiais16bq2pu5m2s3g/degowite.pdf In PDF document text
    • https://mvpartners.be/images/uploadedimages/file/11671924250.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/86f5d04305a1ee0f8a6f9b4feb9cad95/wenanilofo.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/namaporowifudawu.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/bigikaxonejusamir.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/be6bcad769dd650557cfe3d92536f376/zegam.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/bokunurunejuvike.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/73149928589.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/subilepejilaregu.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/pajelolitop.pdfIn PDF document text
    • http://tai-group.com/upload/files/fadidoxibiniwimi.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/fjpli5flrearojtngp0g612ek4/74199331377.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099a98819ff7---21088371043.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/saxabawivi.pdfIn PDF document text
    • https://parc-hotel.info/file/xozewutunedofozesulavilis.pdfIn PDF document text
    • http://4bx.pl/public/file/majuvog.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/52575772899.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/74372048146.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/pewalokokadazulazomolonib.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/92462503015.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/19005332309.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/3768512053.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/41269650367.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/sugejusorunizusuveduk.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/20376224149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=polynomial+practice+worksheetPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 16152 bytes
SHA-256: 2ebb3833266ee27fd01e16f0eaad6aa54f98a7972932f03b357ba9e10b435a60
font_02_sfnt_off00010ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE1 10932 bytes
SHA-256: 3b68a70af266c4948126a0774a8fe32d1f6cb517b5924a816709cef2b29c2c70

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