Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bfd8bd692350cc…

MALICIOUS

PDF

81.3 KB Created: 2021-09-16 23:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cb5cf5d239133867e2d731c8bd3e991e SHA-1: c9c3a7742347d69a2838f5aadc9ad580c9f4499f SHA-256: 30bfd8bd692350cc439f7f5cf40590e3a5739c466bbc418d04119a7ed0e67bb9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution by redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=sultan+tamil+full+movie+online PDF link annotation
    • https://himarco.ir/basefile/himarcoir/files/lunaluvuzulenovawot.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/gapiz.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/jowavavemogezaxipa.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/nujanejopogamaba.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/43800775779.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/35417508898.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/mopefesowokiki.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/6918916492.pdfIn PDF document text
    • http://willbramephotography.com/85249718791.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/69713517032.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/gogikewafopofupabekiti.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/dozezamixobafuwabexetigaf.pdfIn PDF document text
    • http://tochalco.com/uploads/files/65228853161.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/47066507961.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/81095444875.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/84134012421.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137453c4dd14---fexitefezonegutegige.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4758670a5---lovodotusilomidimipag.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/koferura.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/xeguj.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/2377869280.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614203fe51eef---86740238566.pdfIn PDF document text
    • http://imbirimbir.ru/files/sexadibodoviduliruxez.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109112018068402.pdfIn PDF document text
    • https://derfo.info/resimler/files/vumoxelape.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/vitumuxugi.pdfIn PDF document text
    • 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_off0000dbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 10348 bytes
SHA-256: 1f6123d25c1056272ca64552893971ff8aae293eedbeec718d8db3acf5386836
font_02_sfnt_off00010b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B45 17272 bytes
SHA-256: 7d2ff99737aab8ec16607bc683a8b0021a6bb2b127e9568dc6f951f8089d4f99

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