Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfc0f6e2ea4e689…

MALICIOUS

PDF

69.8 KB Created: 2021-06-09 15:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fc7037a8c6f1629766bcb96f95558bc7 SHA-1: 0307cc20ebf2804fdda5dd4c0851cb3755b02415 SHA-256: dbfc0f6e2ea4e689630ad03aa47e8e01995e2d21806e3f2b6e5bddb3eeffd553
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to ringtone downloads, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7648

Heuristics 5

  • 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
  • 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=woh+ladki+bahut+yaad+aati+hai+instrumental+ringtone+download PDF link annotation
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/b6e093df8d3ab9ab144ff1fc6568ac02/71649517613.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a123f02ac69---36987469159.pdfIn PDF document text
    • http://russia-ex.com/67116753744.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4f4690b6055007161b9bcc02a25f11cc/pawojujefuwenu.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd629dcae6---juvijaveperekewuranaveto.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/sfqsqf7daktm66nem8lr05p9u4/16843735617.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/82shm48npdrmsk7ts3qch8h0v1/29627765978.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/0b01b5b0667314a74621c7e8db9f7e05/79025661946.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/2a11ff16e192b6782d549808eaa8a50d/zufekabenukotoletuweju.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0ddab745---nejarogunexexuj.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb2ca9c8d4---97803091000.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7e521be26c0474bcf409684744e357f3/35999425725.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2ba3fa8a---65502117056.pdfIn PDF document text
    • http://rld-carbon.ru/file/kilegetuzitijadizixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD272 5652 bytes
SHA-256: bf1f7e41d2a304ab9eb9d06bc4af85b6597003c6f134bd577c2e245aee12be5b
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 10572 bytes
SHA-256: 665f6bd5d7bf222d58f0aaf88d931df8a733e1a2f388337ab4db791bb651d2b2

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