Malicious PDF — malware analysis report

Static analysis result for SHA-256 3975677e6342d6b3…

MALICIOUS

PDF

73.5 KB Created: 2021-09-25 14:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a0d96951d9055eca09d335fce5c91730 SHA-1: 328c8ce8aed3431e34f0a1860196ab0d8490deca SHA-256: 3975677e6342d6b399d8aa7cf6c6c5c04d6d700f271c167404b3ef8f901c2b64
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links likely serve as a lure to download further malicious content, potentially exploiting users with fake download prompts.

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
  • 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://www.jobibon.com/admin/userfiles/file/36107783974.pdf In PDF document text
    • https://odontologosmalca.com/images/userfiles/file/kowowifavided.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/surida.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e14f28f9a5---11086019678.pdfIn PDF document text
    • https://andana.us/files/files/bejozusaxoselap.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/87910749614.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/niriwedeturaxefiv.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613365a538975---38659584211.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/juxumekinizolitupovonov.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/8kkd2k8t5vef25bsreh90uq5q0/digakevivufe.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614069bdaf872---25891643815.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/37996612062.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/suzel.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/78426394003.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/49127311542.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210901/file/16304841105724.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/rimemelumoxi.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/woduji.pdfIn PDF document text
    • http://signauction.net/userfiles/file/31845766957.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be087b924a---renuzot.pdfPDF link annotation
    • http://www.masozilina.sk/ckfinder/userfiles/files/negonakivuxi.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/rajunitegor.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/koxix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=windows+app+store+download+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_off0000b981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB981 10692 bytes
SHA-256: c778af14778fce1ca7b8bfb309307aed86d5e11073f5e01589418840a763c41f
font_01_sfnt_off0000d233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD233 17740 bytes
SHA-256: ccc899896a6883f18bba4eeebf219dbd5eb342157cc7ab403f28ce713157f419
font_02_sfnt_off0000ffea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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