Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e3a1ad69720040…

MALICIOUS

PDF

81.7 KB Created: 2021-10-08 11:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b8596d00edd65dd9c925eb2ab0c2fd17 SHA-1: a309de77b0332d19f01ef8fdf4aee71fb7e289d1 SHA-256: 36e3a1ad69720040406614382801d060d133dca10826bd32f80df6007a7f8860
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://santehsevast.ru/userfiles/files/tutinovegizixogu.pdf In PDF document text
    • http://potlista.com/file/files/revikamikilimilen.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/diwosoravopi.pdfIn PDF document text
    • http://mtegl.wsystem.sk/userfiles/files/26188773056.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n6tko2n5ja0spe8medp1magkr3/wevamifenadakazav.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/37506261661.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210912055234.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/mogak.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95980916587.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/49998483704.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/raxatopeboxozel.pdfIn PDF document text
    • http://www.vnv.nu/admin/library/ckfinder/userfiles/files/85031693998.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/21125181941.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/12366550725.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/lurexofotavixizuki.pdfIn PDF document text
    • http://dezis.ru/uploads/files/gomuw.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/bifusotonovalulenopobi.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/59840655518.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nhbjvqs86c25k9696du443d737/megoxusekakebowuledibex.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a927d66684---gujakugokajoripofikivo.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/wemoxefuvo.pdfIn PDF document text
    • https://wasael.com/userfiles/file/tedepapedogorifukasadu.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/webigipomot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=largest+sugar+companies+in+the+worldPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 11104 bytes
SHA-256: 9aad668b453d27e1eff425d57729a82b29dd65397cf3eb3ce37aa527878e5a50
font_02_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 19400 bytes
SHA-256: 9cb51034964deda13fc060d7908647b95de0f9a4fecd027a6619f88918079f71

Open this report in the interactive analyzer, or submit your own file for analysis.