Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e7c005c9ba0133…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 04:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 16b77966f57ccdf367d339c2c4533071 SHA-1: 3b88fd903e145d315714e1a74960efe408f306b2 SHA-256: c6e7c005c9ba013379dafe04fdc991c7eb52cbca63ae56593ab781cbcb43a8dc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as malicious by ML classifiers and ClamAV. It functions as a link farm, directing users to numerous disposable domains hosting other PDFs, likely to obscure the ultimate malicious destination. The presence of embedded JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://salespate.com/userfiles/file/58326450651.pdf In PDF document text
    • https://webmenuplus.com/images/file/tofojolepenivuvumirasaw.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/5875790598ba55ed4a15cf13010b66b7/95113088165.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/gawijuzixakigo.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/97921679164.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/ribox.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/legazo.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/limev.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0433154180f9a7310dc2743880fc7c65/73651895099.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/kidetaxesoluzax.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/rawuvilaroziz.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/4053095196.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/80901569334.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/bumokimuwuru.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/50045324043.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/mibaloduxalimada.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///bibarewisebobepo.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dijamuditobome.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/rafulifapilagofe.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/vedawivovejevujumegosomi.pdfIn PDF document text
    • http://sns.hu/_user/file/xidefebikuvotejowudeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=wrestling+revolution+hack+apkPDF 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_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 17808 bytes
SHA-256: 1d0fe14ffa9d3456e8ff69bb9317828e60d6d26aad224a57bffeb8974229f3b0
font_02_sfnt_off00012095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12095 10904 bytes
SHA-256: a3d24abd1a1f20de033e1c4888e55077e3f3a35cbc5ca94fbeeb73d9f4df9201

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