Malicious PDF — malware analysis report

Static analysis result for SHA-256 beeeeccc4ffa3cbf…

MALICIOUS

PDF

74.7 KB Created: 2021-09-21 19:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6f35acf0a69188df218829880f8908d5 SHA-1: fd0da2380f3c0862b935184ba84235b036537f6c SHA-256: beeeeccc4ffa3cbf9b9e1970e6bd5f5d9dcf988e6dd5c0598d916348aec1e467
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://corumosmanlimakina.com/js/ckfinder/userfiles/files/givuvojefatoga.pdf In PDF document text
    • http://trunglam.vn/uploads/userfiles/file/degifiniwoboz.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/92716791396.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/sorewubufajaridukopemeso.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/94236958722.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/kabidefelezesadipusit.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/7949932545.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/55159265017.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/99792497086.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161413ad556012---vemazigovusonuwesul.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/bupalujivakaxog.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb3a5655b---12277736273.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/zudejorudefepaxi.pdfIn PDF document text
    • https://lapakunited.com/contents/files/77444137770.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/57058081447.pdfIn PDF document text
    • https://davaocarrental.com/images/file/19005529942.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210903_43B46BE89CB71549.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/dizota.pdfIn PDF document text
    • http://carbonelite.ru/file/67007124044.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/netetizudajimelegas.pdfIn PDF document text
    • http://kelsenator.com/userimages/juzutapixujavabuzarope.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612feda03cd40---segerijipekobar.pdfIn PDF document text
    • https://frisch.ro/files/file/13395473877.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=is+48+a+prime+or+composite+numberPDF 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_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 10968 bytes
SHA-256: 38cb9d72cf00386b1ff4f6d8b996ab8fde38664befc010218e7b68da37b8caa4
font_01_sfnt_off0000d8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CC 17084 bytes
SHA-256: 36aef009f2175007b1f0f8fc7792e7c7a2eaf3f87c51cabda839a31b822e7c1f
font_02_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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