Malicious PDF — malware analysis report

Static analysis result for SHA-256 afca0bddc4f0dd70…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 17:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a35bb6ecd90eb1ef88676d13166101d SHA-1: 977e62ef8769f0296a0e1d89ecb329db991b419f SHA-256: afca0bddc4f0dd703f31c6e490de0ac572db82237b9958428f1f1afe00b835fa
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://nature-revive.org/files/file/24839736543.pdf In PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b527e4662a---bavebukulu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5272cc6490b849380a447a9740de2b85/98590406743.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/dugowibivilefugedojupefe.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/62qj2m8di9i18ker5jqkumal29/lodagapawofok.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88488653983.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/gomopipujun.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/ratitujuf.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-1/20210501110356370129.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/kakijuda.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c34e4a6390c---punomovonudiretoduzixe.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608289b43824d---tibasalotiv.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/dirosuxelud.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161065496da48f---73984631398.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/gutubo.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/gujuxafevebo.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c063d524ad1---98685657775.pdfIn PDF document text
    • https://chp-travel.ir/data/file/basotozosozoj.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/76044783664.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/bexitinitezep.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/76065767292.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/rogabuvasaxenivexi.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021052810062473499.pdfIn PDF document text
    • http://rentaruedas.com/files/others/wujumejalotanil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=que+es+trello+pdfPDF 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_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 10292 bytes
SHA-256: fd5c5766180619d55992b20b702b77dd2b84cf5a41c72bd6bb574af52fdbe4bc
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 19296 bytes
SHA-256: 4b84781040c8a6289c18bc926bb227c69e692f8ee264465705d54bb348130caf
font_02_sfnt_off00012526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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