Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fce2bbe37ec79a1…

MALICIOUS

PDF

70.3 KB Created: 2021-09-30 15:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5c90a7e63a7b89f8a7ff157aa7d1fcf2 SHA-1: 5c87d4f4db8a86939027fc22be85f6547359a124 SHA-256: 0fce2bbe37ec79a141d0d500aa99c733440af8467ded81fca599ddeaf920b093
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript which is configured to redirect the user to an external URL. This is a common technique for phishing attacks or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of numerous links to PDF files on potentially disposable hosting further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://altaitur.com/ckfinder/userfiles/files/gurixifafavaxud.pdf In PDF document text
    • http://ildongwire.com/userfiles/file/17152012543.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/xapifojitotiviwazulanedo.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/26752544399.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/fusejonifezeziju.pdfIn PDF document text
    • https://ywint.com/ckfinder/userfiles/files/1632053247.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/diruvitulurem.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/numubunukiparaxen.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/zatog.pdfIn PDF document text
    • http://trovas.com/userimages/97540534199.pdfIn PDF document text
    • https://termofriz.rs/files/90478309479.pdfIn PDF document text
    • https://kede.org/userfiles/file/64184492587.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/pulutumodizufojo.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/44892643367.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/repelujigunosomof.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/zimasexekofaf.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/tifuwer.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/2171977292.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/57236371624.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/fubagapiletodu.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/64870848781.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/wovimazewezonukuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=hill+climb+racing+luxury+carPDF 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_off0000afb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D0 10500 bytes
SHA-256: bddd67bd6267882d9a4dac1e4fcabd41745c1803f15e7afbd57683b0ddae738c
font_02_sfnt_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 17404 bytes
SHA-256: 8f1ed045328f48934438581821da9ecc553b6c98d4369834177fef7d2f805898

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