Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade9da4e96cba8b6…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 19:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f1b73b5cbbda486fa6a9243db0bb8689 SHA-1: 0bd2a4399ab58148207ac94d5164fe17a95bd483 SHA-256: ade9da4e96cba8b69aa45cfb3533f09065ca9166da46c706d9bc775f2dd8b259
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that the document is a link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://medvor.ru/uplcv?utm_term=john+wick+chapter+3+full+movie+online+free PDF link annotation
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424fefea03f---92136468344.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/51253829846.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/bozudakejisilitoxexadamow.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/dagan.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/wisipakaku.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/94021262819.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/9d8351078f46455f6689b434e00aa9f2/88342033331.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/80663854065.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/20483259717.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/rujezubuv.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/jutazufejefuxutexop.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/bisixavato.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/3666593209.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/99872827889.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/10877713629.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/1250560614.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/11984377207.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/bagababumewati.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/duxuvotipupofogo.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/mexevidagusega.pdfIn PDF document text
    • http://nhadeptannguyen.com/uploads/files/32966338475.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/pizumapikazosowova.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 18208 bytes
SHA-256: f7f70ecbc11676eb263d586fa6257a769db685e320d568bfabe62563ae5393e8
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001201e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201E 11084 bytes
SHA-256: dc08427c76cb6928a41a72a21433546689326ad0a57922db8fef727c8217060f

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