Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f57014aa040ae0…

MALICIOUS

PDF

71.5 KB Created: 2021-09-30 10:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a99cd23a8027e64002f318e01aa05ce1 SHA-1: 965f3c6be71f7c09c53999315de3317ba6417e17 SHA-256: 66f57014aa040ae05744a04dd13e21f53fcb84252336588ae73ed87d0d8c1608
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to further malicious content or phishing pages, exploiting users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://drafthe.ru/uplcv?utm_term=power+rangers+dino+charge+rumble+apk PDF link annotation
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b75c0755c53e532faca70ae57606d61/43190463433.pdfIn PDF document text
    • https://12shio2.com/contents/files/2522935391.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/4478597651.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/l4a5s2jer0e6g9id7lq067k5jq/gufewesorilasexonulu.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16139640873683---84113569022.pdfIn PDF document text
    • http://asv-solnice.cz/_files/file/darutepudiduje.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c35171b4c---90566283917.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/gopegepudedivonozepi.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/rabigukebelijejipe.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/68964441709.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/dizusidamelitot.pdfIn PDF document text
    • http://freestyler.cz/img/file/pibigadiworiwodaferox.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/ralaniti.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/50820489600.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a7f80f267f34b46fd0ee63538a6c4f4a/23319202697.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/99234205586.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/laduzupariwosapakeladuj.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/82007241894.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/xiwar.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16146941825d93---88557498131.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/14723772502.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/50620812c8a5b97329e2dfcd812626b7/13690909355.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/84581318122.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/newaxokezibovifume.pdfIn PDF document text
    • http://gapp.fr/medias/files/19186679049.pdfIn PDF document text
    • 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_off0000b533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB533 16328 bytes
SHA-256: fb006d6da4136bfbc7fd66bf69ae29fa39e1cf7a295b7f2d048479771d40bc25
font_01_sfnt_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 11280 bytes
SHA-256: f5bec60f1fdec31a8c11b87b824d0746a144dc8dcc208790b36a961e40d46041

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