Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3924e1f24f5a80b…

MALICIOUS

PDF

127.3 KB Created: 2021-06-27 17:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 102761b10ec2f56add76fa0b65be697d SHA-1: c67491a84b0fc9054af0424e07e1ae5987562471 SHA-256: d3924e1f24f5a80b84eb0148ca529b3cc4e9bd1af47745c1770e611df85e578b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and numerous external links are indicative of a phishing lure, likely intended to lead the user to download further malicious content or submit credentials.

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://kopdesign.nl/userfiles/file/11638118507.pdf In PDF document text
    • http://libertyquad72.fr/userfiles/file/25758966040.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b325ff22243---patagizewer.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/0jp2lt9lt5kfh7br2usn2fefas/kuzatejedo.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/90281862941.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a95a4a08f24---57622138043.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3d997aadc---xidenonunama.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/a6ggvbgjm4r7aep2jrt7hj0qk0/23147768651.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac54c20e2b9---kigelosudowulatinoviwibuf.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2cb10f79f---salulemaruwegusaxukax.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b86819b11---79345382387.pdfPDF link annotation
    • http://mispuntossaga.com/campannas/file/75518482281.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c19f5c458---poxopak.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/48094942020.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a719faac1f1---62705303050.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/retadiwuluwimemine.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a61325d796d---74787656395.pdfIn PDF document text
    • http://labonscafe.com/userfiles/70259941112.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda0cf19be---zuvowaxaxibete.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1c668ae1eed02f1d7fb00b1425aaf2d2/gofabepemenusaraxisogelo.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dc7db9328---51797787500.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/442rdcmiuum9kgrnldg8nmhdb7/sofedugolutubopejonele.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/2548419424.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/61c49fd757ae3ed697234c81376be664/suwewobetajapitofuguta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+does+the+name+tonya+mean+biblicallyPDF 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_off00019045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19045 17888 bytes
SHA-256: 3ecc4949e7fa4bc130e1f20042257a19d1b9cbd5ba381437e7dafc9d8ab9f6c6
font_01_sfnt_off0001bec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEC3 10780 bytes
SHA-256: 23f92a269366dc16db58ab6b820978d508021a12d788fd8549fa4a18d0540ca3
font_02_sfnt_off0001d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D76D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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