Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6746e7591a6884d…

MALICIOUS

PDF

71.3 KB Created: 2021-09-04 18:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5267acff8e49383f4777c64cc02d415 SHA-1: 0273760d9d27483dedd8f40d9f132ba26365b866 SHA-256: f6746e7591a6884deb602ced5ff8ab694969b79857b31e95370d65015179f156
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://huntic.ru/uplcv?utm_term=tama%C3%B1o+normal+de+la+glandula+tiroides+pdf PDF link annotation
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a46a482d1e7---50322296702.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/woresesudonigelimafa.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/4ailvb66afbkv60ar7slpoips3/32487275443.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14eeb0afc---zewowixisawinoreruluxam.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/zedabus.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/nobezaveriferapopofusep.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/hhr5b56n3vjf57nnid0n9ro0b1/lojonem.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/8929738388.pdfIn PDF document text
    • http://nensi.si/upload/file/jorekifago.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jd3616shdf0i1asojnvrtj79m5/49594527901.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f54dfa56160---karinarifa.pdfIn PDF document text
    • http://df-foundry.net/d/files/6702958199.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/98608617328.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/1d1c02632aab2990475246ebaa558878/66618821144.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/86147384835.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee24793f1a---57785512004.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/992c78b7403cf2bf543ff6ce1781c16c/69801331468.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/91323602995.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/jobisewixepefisofixewa.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/533d5d6d12edcf97516521e773b89923/87373847735.pdfIn PDF document text
    • http://wohingltd.com/userfiles/61469302195.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/7edlh5j21eflo4l1ofhbqvtmgb/93981367717.pdfIn PDF document text
    • https://12shio4.com/contents/files/garazokakufebikime.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_off0000b3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C4 11108 bytes
SHA-256: c4c1d9f18f89bdd7fa75613468b0fe68720514bcf9d010394fe98a107e8ceeb8
font_01_sfnt_off0000cd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2C 16048 bytes
SHA-256: fa23c880e60f98d2f6480fe041749d805a577a318d449b498d1aa3b308fc0b09
font_02_sfnt_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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