Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6d5e641594ed29…

MALICIOUS

PDF

84.4 KB Created: 2021-09-03 03:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ca58cfff57e849b4be6b9fad37285fc1 SHA-1: 5edd193f22390ed6e18f86af7b91e575d1cb81e3 SHA-256: 6b6d5e641594ed290377a101f3417f377e9dc90c594c71f00e256ce6ef6cf4ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous external URIs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. This pattern is commonly used to distribute phishing content or redirect users to sites hosting malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://falconshipping-uae.com/userfiles/files/dobokebul.pdf In PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/2108152325056611526u8mm.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2a02fb6a---zowimipenonizaket.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/34620817017.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac964dcbeef---sepowusagikejizisaruj.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/f10de91306bd5eff6d10aee67d139ba9/14358152561.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/22609144115.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/73312349554.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/8153319607.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45bedbaa3e---11101492269.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/eurc9fhrjc1648on3hk9g0tm6l/zutesufo.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097c974a9ea5---gaputanazodoxu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa26a1b7dcd.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/biporen.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/samevejebefujaxutot.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/67721146264.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/85eede26bec501568530c6298baa06de/8935359096.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/161645026899.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/58393053801.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/45473175627.pdfIn PDF document text
    • http://chromavials.com/d/files/nusuxorefalorepilebakilik.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8dc0b8c9a---wakamojiludo.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/5ff17848100e72d62b03916acf0f585b/64326087099.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/milutumutokanelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=retour+d%27exp%C3%A9rience+projet+pdfPDF 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_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 20264 bytes
SHA-256: cd6733b1eb9031a3b6b9adaed8e68ca5ee7295b7a6c2b8db4cc4647a3e986cb8
font_02_sfnt_off000128fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FA 10804 bytes
SHA-256: 5817c148411e6870703d655b95691d1fc17f30cc236258b9870471bfe6cacec8

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