Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade5835ef89180e8…

MALICIOUS

PDF

83.6 KB Created: 2021-07-14 00:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 35776adb6d59b0017cd4331b0ba1a58e SHA-1: 9e0c1547566ecd967719067b2e78f9415564a3da SHA-256: ade5835ef89180e8492c178d420af0e1b85170a0aec7a8d4292e8ed181997836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing or trojan distribution attempt. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm characteristics strongly indicates an attempt to lead users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://coretry.ru/uplcv?utm_term=pirates+of+the+caribbean+2+full+movie+watch+online+free PDF link annotation
    • http://tlxzkj.com/uploads/file/052027418985.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/8899644774.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/16616923359.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160916c04e309b---fukuxademof.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98eaf2b7c---37782667605.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093137d77653---senizo.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/gevorawuxutus.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097b74c75134---jifasegufubinemenegisit.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a20e477a52b---repowosaw.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/23352452367.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/34520715085.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6c359869e9743635dc7580c787ff28a9/matidevereto.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac87f72b76---jibevinimuligexutagaje.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c22c54512---96968713697.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/71499833132.pdfIn PDF document text
    • http://sireny.net/share/files/wuwusopit.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/33294173497.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/92166768703.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210530054439.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a4d01893ef5dc60211e16be37453b6c6/17400117356.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/870cef3b5cd4a69850edc7051dacf45e/jisasetid.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c04eae230b4---mokuto.pdfIn PDF document text
    • http://haki.vn/uploads/files/notalaluse.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/3342eb829f42f6eafadf56690d5055c0/90699713866.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_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 11112 bytes
SHA-256: 6b78ccba929a28d70a3b875e9bcb19d077d48c5dbad35222b8b6c2df40d0e343
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 17016 bytes
SHA-256: 07447b57a40166554f961d7c1ad0baa06752b5ff18cb5bd68c297c4554f18608

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