Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30fcf32e97b0296…

MALICIOUS

PDF

71.9 KB Created: 2021-09-27 23:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0ca67218495c0c6546192893e7263a7a SHA-1: e972a429022f71226167f27e5c0a4e183b6382f7 SHA-256: e30fcf32e97b0296112445232b902a29195235f57b473cbf151dc0a7e64b89df
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' specifically indicates a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://diamant-x.sk/UserFiles/file/7872750049.pdf In PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/87850129620.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/puzor.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/25181721138.pdfIn PDF document text
    • http://fxlcd.com/upload/file/kujobije.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/binul.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/65740025940.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/8eb5020f3cd7367528b3611bb1f6ae6a/62102914573.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/86033998662.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/pivovuwodofonot.pdfIn PDF document text
    • https://angkalaris.com/contents/files/8347349541.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/61aba3574a9b263160f0aa6975b8332a/94223936191.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/46967656744.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/gebubo.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16140738e7d635---zuzerexedufige.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/vuturofoz.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/rajabujigunikejorikezapas.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/25928683261.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16131f68bc4c0a---29172021438.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/xutik.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/nopimetu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614350b174e2b---41306954425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sonic+dash+mod+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_off0000b409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB409 18028 bytes
SHA-256: ae821bc40ea1847e5c2b7fb1afde31bb89c8159303a329d377946943fde4ec17
font_01_sfnt_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 10572 bytes
SHA-256: d518f4f46b18f4a443e0540239271142a8d7e148ab5c88217aebce09404d2d76

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