Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ced4bfcb77352a…

MALICIOUS

PDF

106.5 KB Created: 2021-07-01 15:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 56a82f770fc2cdf4641fda47d0cadabf SHA-1: 7e0017636f85b97fb0668ac7045e3f2bcc9f8532 SHA-256: 15ced4bfcb77352ab40b7b96320202542869c6ca2cd31b688f98e68d67958033
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains embedded JavaScript, which is often used to download and execute malicious payloads. The heuristic firings indicate that the PDF is part of a link farm hosted on compromised WordPress sites, suggesting an attempt to distribute malware. The document's content, combined with the nature of the URLs, points towards a phishing or scam attempt, likely disguised as an invoice or payment request.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

Heuristics 8

  • 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.
  • 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 http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b617a8b05864921df251d87f173c94b1/fowajegigagezezunol.pdf In PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/cjpf76i4m1c62lbntljurod2p9/dagizijinatebazaxu.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b6108f28---zetizu.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d211b6d2e5---30278274962.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944ad92a5a9---joxuvirakotut.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/cddfd868bdd502c4c868d03d1ceca0e2/fixolufapeguselewunejik.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d6894610---sakitomeriwegisuxiwora.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4cfbf232---kikutipozomivamuroto.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/l0cvr20854ett4rh34rd4qqlds/sajubidag.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/48638462966.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099af4bc98ab---73662054277.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/toshv4l28t2sfq64j0m93tmg16/62169835010.pdfIn PDF document text
    • http://allasclub.com/campannas/file/17821481569.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/bakopideluno.pdfIn PDF document text
    • http://ud2-140.com/files/56410449797.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/figubozek.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/aep42m0kdva25ibkcnjmte2d40/fapaxofiwades.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/3826141b1da570c02d29feca2c0882a9/polumedigavogeja.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/kupulelukamonukimusox.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb783ba7d---jodugidopowi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/14542029539.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f4e66ca84---magaraferas.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/f1e69cc4cecfa903846bf41a9e2f3a8c/wugimamogopeduvomum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=converge+available+areaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001275d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275D 10252 bytes
SHA-256: 3b9e061c61abbc77a8ec01988327581f967e0ee515aba9ce0c6be449f448103a
font_01_sfnt_off00013e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E86 17036 bytes
SHA-256: a0c77d14ca1f6956bed5fb1cae73a935ca1d948738dc61f0b6f9612ae193b6fe
font_02_sfnt_off00015759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15759 17376 bytes
SHA-256: be2f963e9e573b6f288299eb8cfd1c5f820ffb5dd8d28b16cab19da1eb45313c
font_03_sfnt_off0001847f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1847F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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