Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec381f774def79a…

MALICIOUS

PDF

68.1 KB Created: 2021-10-02 23:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3bdefbc936923d719a10667201846a1c SHA-1: 8b04fc6b3929f1ab3f7cfbad55b7de2f68bd2ff2 SHA-256: 7ec381f774def79afeb0c21e648bf1ee4784bd7efd7c931950a19d0333b8469f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of embedded JavaScript suggests it may attempt to exploit vulnerabilities or further redirect users, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nomylo.ru/uplcv?utm_term=thin+mint+patch+reviews PDF link annotation
    • https://auto826.vnpec.xyz/uploads/files/84894686711.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/laritowawogi.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/975446739614821823b4c7.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/86891012541.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/59861064622.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gal7iqe1u99tp5mc69ca1mbil4/86628473586.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407099b4dea---7331602923.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/5ovbdqtcrsc9fuu53hqhei9uhs/41769554118.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/busewejevebobutapivuzas.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81604024832.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/xejabulilozaxikepan.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/27828017612.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/vamiwopugirafojivofewixe.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/nurejugipiz.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/jijaledaxud.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/14268654538.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/semunorutadaromonowa.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xotigulelupod.pdfIn PDF document text
    • http://dominant.name/userfiles/file/87461749116.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/2335744152.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/xijowanigujaposudiwev.pdfIn PDF document text
    • https://kettosallampolgarsag.net/imagini_ws/84674769096.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/vabafizuwokalex.pdfIn PDF document text
    • 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_off0000ad33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54A 10588 bytes
SHA-256: 208810f2ab08c620eea4d976976503f6e0ecf2fb87a6772fcb4b75768d079448
font_02_sfnt_off0000dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 15120 bytes
SHA-256: 2d31741832e5d3e659b0699ced7718e1381358e10a91e17d47a137eb417bac45

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