Malicious PDF — malware analysis report

Static analysis result for SHA-256 047005c5f61e919b…

MALICIOUS

PDF

74.4 KB Created: 2021-09-16 10:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ec7cf87d9c1cc6b72c9b493b2ca4cc1d SHA-1: 5a30d8166b5809cbbef2de912fc6a528f8393801 SHA-256: 047005c5f61e919b7f14233fc2f9369be3510f20cc8281f930f1f8bdb4c70e02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, likely intended to redirect users to download malicious payloads. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://artistprasanna.com/userfiles/file/vuzenoxatiluki.pdf In PDF document text
    • http://sentralperdana.com/file/85006770852.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4c78c261a---94793489254.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13865585837.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc0012a5c---23909285234.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/talawino.pdfIn PDF document text
    • https://dalba.net/other_files/File/sijid.pdfIn PDF document text
    • http://devveb.net/userfiles/file/guneturoxanogenusijuj.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9ae807d2ade7d5093c24180ef559646c/giwezig.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/9868809030.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131f5f42f925---pujakuxezolifenukozanix.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/9664320073.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/87938925848.pdfIn PDF document text
    • http://jump360.co/upload/files/20210902152650.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/waruguj.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/72415134921.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/75593801869.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/bimefejububi.pdfIn PDF document text
    • https://irantruck.ir/data/file/92627644552.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/dipapepi.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/685c1e4241bb1ee6f8f72560485850f5/28387340899.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/kimakerovusesogib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=free+game+downloader+app+for+pcPDF 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_off0000c150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC150 10668 bytes
SHA-256: 84f0a6ebc0f592c34dbf7850f5f8e3f8801cc190db56f4e4ad5af2433476efbc
font_01_sfnt_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 16548 bytes
SHA-256: e7aa8a398ed263096b88682b1367ca2177d7d74134c3f029f611609c5e6d7c61

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