Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ce8427d75775f1…

MALICIOUS

PDF

96.4 KB Created: 2021-09-16 09:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff6c72858f453350bc9454662195898c SHA-1: d0d1b969a72186934aad57a663374cb7cd412b14 SHA-256: 96ce8427d75775f158113592d971b686493c87400ba0f18f048db297c3f2cb48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://chcial.ru/uplcv?utm_term=best+dj+application+for+android
    • http://xn--eyt274i.com/upload/files/roxom.pdf
    • http://groupelamiri.com/uploads/FCK_files/file/varixiweka.pdf
    • http://improntediteatro.it/userfiles/files/41895583892.pdf
    • https://pcparts.fr/ckfinder/userfiles/files/nuzexodetajetegosorit.pdf
    • http://www.moyekolodin.com/files/72252283947.pdf
    • http://cn-daomeng.com/upload/userfiles/files/731c0d259b2dd814205c611c5b66f059.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377151c3eb6---nejiwuzolojusogidoxoro.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b6962a52c---11609376509.pdf
    • http://wixoon.hu/upload/file/82655278245.pdf
    • http://iburgisidimarsala.eu/userfiles/files/taxitabadulumofaluji.pdf
    • https://louvre.lv/res/wysiwyg/file/29369241274.pdf
    • http://hujiangsy.com/upload/files/48473601254.pdf
    • https://yocarbroker.com/upload/ckfinder/files/77015877386.pdf
    • https://snoman.mb.ca/ckfinder/userfiles/files/zujiveto.pdf
    • http://wujipacking.tw/upload/files/gufepa.pdf
    • https://kapefashion.com/files/files/57581794136.pdf
    • http://kleni.cz/userfiles/file/93628357038.pdf
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61417225570.pdf
    • https://ijaetis.org/ckfinder/userfiles/files/54026963495.pdf
    • http://harryreichert.de/uploaded_pics/News/file/bibetik.pdf
    • http://ecole.ru/text/images/file/45598579475.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1b12ad57e---99049113391.pdf
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/gitawesegegukubugovesav.pdf
    • http://huarui-bio.com/upload/files/belemiwofulunobewijezake.pdf
    • https://didaktika.drmix.cz/uploads/files/wuzinigivupunul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001142b.bin
84557c19c66302fa0537c352c00f3a9bd2c15d9f8be12e0513837bcfedd3e2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 10796 bytes
font_01_sfnt_off00012d1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1E 16792 bytes
font_02_sfnt_off00014530.bin
ec367e66ae31ea021409758fffa40a7389e193911a34496cde363e134ff883c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14530 17884 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.