Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d50ee1c9d680b0…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 07:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0a9936dc725981ca40d82c7ade0a8b47 SHA-1: 83c684a351ba835364f9f1ad83d2e67a4552ccc6 SHA-256: d3d50ee1c9d680b0b969ba594ce7535bd62fc391b0179464f6199fa0b4f5e323
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://moraure.net/js/ckfinder/userfiles/files/28853455744.pdf In PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/7dl6h88r2qcikaijcd67v3531f/kirev.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/togegedoxumerume.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/53520490077.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/rewunegafaxekemopibisaxam.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/b6676462465b85b98493024cae3fd7b9/41189738521.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99e3f266e8---31600412067.pdfIn PDF document text
    • https://posh.hr/files/5288433298.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/rixarokededaxutu.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/pnmb7o1sa536eigrqlbf8r6ol9/92443165856.pdfIn PDF document text
    • https://premiersuli.hu/files/files/91434844175.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/xofojaduragararefubola.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/lalikepikomusemepuratone.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/7c67998f426b0eff5f6326d741910e40/83651597733.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/81855984049.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162393004947754142894.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/42649424485.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7f9e21c59---23583045769.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/linoledanavo.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/4k7oeqh90fr1sq93jv8eigf2rp/fumexakifinuvutaxiboz.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/72685792132.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/9572040243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=symbol+of+butterfly+in+lifePDF link annotation
    • https://b2cdemo.tickets.com/content/files/razivo.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

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_off0000f189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 16816 bytes
SHA-256: 092fb3b83c6ef31e4beeda1f1e71fd85239de071094f92980aee6dfad9c878f5
font_01_sfnt_off00011d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13560 10472 bytes
SHA-256: 74c606bd83fe4d726d7964112f1851280990635d3ad272319da8b74942bb3d3c

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