Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5230aa6e7564260…

MALICIOUS

PDF

77.0 KB Created: 2021-09-05 20:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b523f437e76977350f3472664838773f SHA-1: b922e2293a67d762ea0aea199d6a7d4893bb7bfb SHA-256: c5230aa6e7564260db01b0d34b0faafee8355ca73ac7a37a246260edb2b4ad41
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious payloads, likely for phishing or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://cribpointonline.org/cribpointonline/userimages/file/89036930003.pdf In PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/vkq88qk52r7rq2uf65g54fju7q/jugoziz.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/vujozabonawajuked.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8d36fedbd4207b9eebe5eb2028fedf88/ragoziwemazeraxab.pdfIn PDF document text
    • http://ideviceplus.be/app/webroot/files/userfiles/files/73892013386.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3d399f787---28509797432.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/29809051194.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8f42bc8aa678ab6e97cc89cc41e7a2a8/46383536151.pdfIn PDF document text
    • http://cissi.it/userfiles/files/4301622095.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d71bb52bf---puvimokixopuwevawamosaj.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/jabajarozotokopupasurexu.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/laxepologateputagopebafud.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/wedusovufibumekajun.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/19faq51at155iu1qlg8i7roe23/dizunujerunapatazubi.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/dpk6vilki6cv8ji4o9agca6o2r/xiponitusovunimonanilogov.pdfIn PDF document text
    • http://195exim.com/datas/files/nevolag.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074181f46ccf---65650245751.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b368e935e23---worezafob.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/8836293565.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/sabuxofer.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/luzuxezonowudap.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/67362795709.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/79742951106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=fdcio223+installation+manualPDF 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_off0000c58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58A 10668 bytes
SHA-256: ff85e19fc145fbd7e49b3437311a5e7f4b989e220e19d1be2b9868598bb02a59
font_01_sfnt_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 18340 bytes
SHA-256: 0c73c82c80e693bb1c53929d34f1b00b908d247abc7c27c25c166300fcb090be
font_02_sfnt_off00010e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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