Malicious PDF — malware analysis report

Static analysis result for SHA-256 b653293430a0f4d6…

MALICIOUS

PDF

92.8 KB Created: 2021-09-13 19:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f58e37332b51f471fa547da1bb42f644 SHA-1: e072b2b39678219b2115592889a3b5aa45a458b5 SHA-256: b653293430a0f4d64c7d961a4638ab4be551ff4df6bb4c16771575fc2d018d5e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It impersonates a cloud document lure, directing users to click on links that point to compromised websites or disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest it is designed to lead users to phishing content or a secondary payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://ministryofrum.com/memlogos/file/25469224574.pdf In PDF document text
    • https://agrilaui.com/userfiles/file/76090332129.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/45029102390.pdfIn PDF document text
    • http://agro-partner.com/Image/files/nevisagi.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/60743714474.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/5411746848.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/97615030047.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e539611a780c37370c3bbc5dc0e39476/8034673956.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/64649441007.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/gejawuziwifotamip.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/38274907458.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/jg2t6c2da2e0o4v19bhj4vkgid/bamamojakejexinovero.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109011728156185.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/72947353805.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/42332848687.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/besaninoxujakev.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/wirilekuxuxiz.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/69875891039.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/54595847830.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161333f8524388---38514762866.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuwiramoroneseb.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/kakekepegojomedabunugo.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/winiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=running+excel+macros+on+androidPDF 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_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 10860 bytes
SHA-256: 35188589749b82779f3c12673b855d1b764ed7e218a974c0a48637eee479e582
font_01_sfnt_off00011d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13571 18372 bytes
SHA-256: cd462bf76dddfa6415723687d84e6aa4e625a71da98e2d527424dbcb2ecbb469

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