Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ed547333189fbb…

MALICIOUS

PDF

78.6 KB Created: 2021-09-19 13:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d543e571b87723134a93b5af739bc8d SHA-1: 03fe50ad00e44885e9552aec928c4fb69e24dd85 SHA-256: 47ed547333189fbb11c4501269e2383756c766dedbfc53e11be551fe21d7d1a8
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs, some of which point to compromised CMS uploads or disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content, likely a phishing or malware distribution lure. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://fasson.vip/images/editor/files/41542652116.pdf In PDF document text
    • http://compsult.net/userfiles/file/71573099175.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/92948602706.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/tepitilowiluvapowodamade.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/74644834780.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/nujoguma.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/2140016465.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/51066825588.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/4140285268.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/bipomotutigifarunimuxozi.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/nefoximejojulobofidi.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/71fbf24e983ffee266398f7f72871104/getubawaxuramadozope.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/fadezafik.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/robelewaxujanekibiv.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/97459966470.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/20085948734.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b7f37d4e5---gulomepubogapinav.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/ridapu.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/jesapilorafimufipejij.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/gapojejex.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16144ab7360206---82708303744.pdfIn PDF document text
    • https://rozynoklinika.lt/userfiles/file/buxuluvukijumupareluwumal.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/34261641392.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/pibubiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=watch+the+room+tommy+wiseau+free+onlinePDF 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_off0000ce3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE651 10892 bytes
SHA-256: 4aac1570a0ddc2fbb03ddf03d17ed21f1813f2e173d915119a9235f3c0f1ff87
font_02_sfnt_off0000ff73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 17508 bytes
SHA-256: 8a8556812e1c9641dafbac47f968fa84abd5f7a7dd3e6fcc76f8e91d3215a0c2

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