Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f4d42b43df6f0e…

MALICIOUS

PDF

70.0 KB Created: 2021-10-02 15:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8aea18919cfba2b5d89422c7bf3e74ea SHA-1: ffb5fa96897252c5b619ba6e2185557f09af0148 SHA-256: 24f4d42b43df6f0ebab270e9643d5187bde101e982f5cdaa0909665e282fb582
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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/pudofekazadi.pdf In PDF document text
    • http://partner-support.net/user_data/userfiles/files/subodinevol.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/kazafufafufaruto.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/455760682614a24dbb6c3f.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/xigaruzenagivudabebeta.pdfIn PDF document text
    • http://redagowanieprac.net/Upload/file/90292951294.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/81649287770.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/80084442012.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16155b6465aa82---vudaxux.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16156c6ffa99de---24483948058.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/cc110ae96a1b8249b4e36e59dbe780f9/45974571050.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/rofuxifexirozosefolu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o2nhiseacqaq24jipen98tib57/gudorufibawopezobirafajep.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161406a0d69b7a---76249561723.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/h0gub8it2u0j33ee9bca9o78j7/porasufoxe.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/16956474927.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/99557653621.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/boxozixoduke.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/naxopigaruvidenuliju.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/38876528958.pdfIn PDF document text
    • http://pactolous.hu/upload/file/najodokorufasej.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/25/36592481308.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/tazajewukivedunulatirofu.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/69882986823.pdfIn PDF document text
    • https://birotex.rs/images/files/soliredajapaxibosirizotok.pdfIn PDF document text
    • https://proia.bg/userfiles/file/33102642970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=underrepresented+groups+meaningPDF 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_off0000b37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB37E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB90 15036 bytes
SHA-256: 3d204971c31592999d618ad26851834654c295f879a15eb716ebf2273f1bcedd
font_02_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 10796 bytes
SHA-256: 24c9d42fdddec4c5a108219df7ec52d93318ded342ba31e7d7109d313273f2a2

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