Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8769d6fca67a32d…

MALICIOUS

PDF

86.7 KB Created: 2021-09-06 06:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f2371b9df9c4b1e30577f6197776641 SHA-1: f0b4f1fac80f1c5e43b8552d5d90ba70fcb2f6f1 SHA-256: b8769d6fca67a32d010b50aee02477e733c1aeab752708498047bfa6beb5fcee
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/7a49641d5286cdd622f9a3f2c2b1cbbc/pulefedijega.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a533b6551c---dixezogagevolovelavanezak.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/widilozeka.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/60038036893.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad804789fec---dokabovatiwifelidud.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/048e2bdfa970783ddc2d1e1042995a6e/viduro.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03e599f8b3---75449531431.pdfIn PDF document text
    • https://x-software.cz/data/file/kasuwimamokavemaviwipa.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/ditikosamisidijafej.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/54970281089.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608239197d26f---31081601626.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/g92b6c0mick5fpuhtm9omngvna/kukidi.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/7959bcb02b8147c0253653920e57d7b4/denidijibuzulaw.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/gosinibidazeduximupop.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/xevolurevuramezizoraxuw.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/tagipozi.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/66104307118.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/1434891032.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c742a3cddfc---rasozuzelekaxekoweguva.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/bezosasemonanaboritotu.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/sotowobexeloxigovadilu.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/wanuvobutajilew.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/fiderimoxeredaweto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=articulos+de+la+mariposa+monarca+pdfPDF 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_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 10864 bytes
SHA-256: 173b364d2fc278fedcc54f9f4a407b5a5dcf19292ead9fb4b9b5bd3ea2074e99
font_02_sfnt_off00011b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B66 19476 bytes
SHA-256: 5a7723df7b82cf585fb5557ec0b37763e807e7576ab9ab5fdb877ac92db47dbc

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