Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8019e060846e1cf…

MALICIOUS

PDF

84.0 KB Created: 2021-07-19 05:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5295e377173c9f4612a8b1c66f68674e SHA-1: a99f75eefe95c822c5fa250f5bafd6bd5d5408b8 SHA-256: e8019e060846e1cf4fe1e84544367bbde86813fa7a638953475523394d1d63a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload storage and disposable hosting, likely serving as a lure for invoice-related scams. Although no scripts were directly extracted, the presence of embedded URLs and the invoice lure suggest the document is designed to trick users into clicking malicious links that could lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/12825ombtt7frc6hi3r7hb8hfq/21507400972.pdf In PDF document text
    • http://carszana.com/image/upload/File/69879745947.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/wifefadapolobamiro.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/citc2bvd268ddtkik59g708dh2/podijuzumavexojuxafi.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/wesabapiturugi.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d653e5046f2---juwifasekijidiludosiporar.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/33e43671fccf6a493850a6a3ab7cd16e/joritarexi.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1d80378d---7731309491.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/72739734136.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e00474cb5---97524687513.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062721454977.pdfIn PDF document text
    • http://delve-cr.com/uploads/kamodojon.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee9dea0e6---33796121807.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f6a17f1c8---terolitavukenuxudej.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/lo4a3e2p49kk9d0kijqsje6ga5/vumofovigobab.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/b2a39d9fbdf1601574967104aa4abe8d/61298583298.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/zirerixogujogepapak.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c62b844533e---bibojeditebedomeb.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/81314558496.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/282037208395.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/wujekoxikufoxiwepoza.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/36218080722.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/43968072412.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/tikogare.pdfIn PDF document text
    • http://allseasonsbanquet.com/clients/868236/File/18142000334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=invoice+reconciliation+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

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_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 10420 bytes
SHA-256: 8422fca1b62fc35f3d81726f0278cbc6e323155bda8aa09cd341d6a4b9676f03
font_01_sfnt_off0000fcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 17548 bytes
SHA-256: 6a3fb92a610d0c951a4f26847945230f893c81bb0444f09c264669ae74348d9b

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