Malicious PDF — malware analysis report

Static analysis result for SHA-256 c702e39678340919…

MALICIOUS

PDF

108.7 KB Created: 2021-07-30 06:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e4bc7cc1e35d31eaad62f6df1dd0a24e SHA-1: 70eff669a41522f1ed0efeac5a9a1bbc5b7b5649 SHA-256: c702e396783409190a3de3a122d12243621f202a4995e5796dc9f1c275fb555a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a specific ML classifier and ClamAV detection for phishing and trojan activity. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://inwebjor.ru/uplcv?utm_term=aditya+hrudayam+telugu+pdf+vignanam PDF link annotation
    • http://aliceinformaticasrl.com/user/pages/75213452035.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160edbea1b6fa5---wujimasenurumeruto.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/52843036586.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087894919d31---jolup.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fd59a40bd---wizabelidivosasasamoj.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/pokupajosi.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/keup7kurhmrchlcj9jqfis6b6c/puroponakil.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3e118b291---31343497770.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/54720272251.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d49b8bbea---44613797633.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe4f0ecdfc---86876232747.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/xomisojawego.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/84139656473.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/remogadimoma.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/dufegaleme.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/xazurazekipupipojesarital.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fa24a4ea---nunubupowimefomadiduxupap.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/fd7633c3744dcbde72a27a2a732ced0f/venubazojelived.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/vefol.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/memapudinifejifubev.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/zufisirejebewaxorizowutib.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a3a92e25dacffc2fe332bd441d7f7348/bumesumabarofa.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/b5oth8nkib07d788sev8tfif1c/runirubepakosu.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/89248692860.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ea8465255---35581674563.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_off000133d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BE8 10916 bytes
SHA-256: 2ee9511169a5651252b405fee1dcd50d17444fbe8d862ef061881c95f60e1419
font_02_sfnt_off000164d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164D1 26016 bytes
SHA-256: 3aa264bcb87ae87f7cccc58417197a2b5b344e0023d902d4d74522b6a641781c

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