Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ade1e1e9e10e01f…

MALICIOUS

PDF

81.0 KB Created: 2021-09-21 14:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad1113a17d052baea316b896a13863c4 SHA-1: 7f9adca8c4dd2804bb99cdfae408dba57d454b8f SHA-256: 8ade1e1e9e10e01f4507fdf062884228f0bea7e47f5da998d362195f8d60dd63
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. Heuristics indicate a high likelihood of phishing or malware distribution, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The ML classifier also strongly flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://fibertechnique.com/tmp/file/sovoguwineke.pdf In PDF document text
    • https://g-mtcc.com/motakamel/Ups/files/64693826319.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109070156251992.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/43308013592.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/77407612654.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/duwenuzelewajatika.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/78841185969.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/65883bc6369e553e7cfcfedd481120a7/11646171401.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/41206323596.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/fovoxalasamafojakaguzexul.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/rejidejemejodora.pdfIn PDF document text
    • https://plasy.com/uploads/file/pojiniliran.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e64596058e---27369959309.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/51572643534.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/vabifonexesafokudid.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/xegexul.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161353e9b4c25b---43094906820.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/78077664931.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/76493012882.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/76526957957.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/6489931400.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/8981677309.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16130d7446cf58---sixilixenabawunew.pdfIn PDF document text
    • http://119pump.net/d/files/33169960486.pdfIn PDF document text
    • http://cold.lt/userfiles/file/tebunipowelasazeniru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=snack+video+apk+download+latest+versionPDF 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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 10828 bytes
SHA-256: 501a35e1061ee7dd5e261c8e6f4cdd070eb376927eeae870f82fff19cbc65d9a
font_01_sfnt_off0000ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 18164 bytes
SHA-256: e80dc1a019fe35f94505c037f9e5d68ecadb346080a5838a6c8cb7aa4833337c