Malicious PDF — malware analysis report

Static analysis result for SHA-256 229c0eba249628ae…

MALICIOUS

PDF

91.7 KB Created: 2021-06-10 12:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0e14ee93e15f4cba8a0f3e1077cf562c SHA-1: 7063b4a67c363990b915b50aa6a907a15b6c12d5 SHA-256: 229c0eba249628ae878de68268b847fb6bcc7d26130ca6781ce51ca5d025d72b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that function as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=la+poule+noire+pdf PDF link annotation
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7102b4403---78897264722.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30926c0cb---woduzor.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/010vu89cehe89oseui2ki1atmd/suveru.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/21810211583.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/99234938950.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/4khg6j9deu46vr77vefojv7565/nagobufixu.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/18250031225.pdfIn PDF document text
    • http://geose.ru/userfiles/file/95790496953.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be94b608a4d---33803593704.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1b4065af0---2392363329.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d13784b17e8f7f2899754c7e21b2de37/radamutoruzunadaputivose.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/244464a70b9650f35810f7fc3980739c/87476630362.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b092b3d3232---87521381635.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/75d8bad1d6e8709e009bc84ce5873500/rivitaze.pdfIn PDF document text
    • https://invest.pl/userfiles/file/63149180727.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c70a55b02---91834823935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 4800 bytes
SHA-256: 5c7a1d7faec82b5471cd58badb239b4fa7387715d8d762e219a991834d5f6718
font_01_sfnt_off00013951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13951 12776 bytes
SHA-256: 9242e28dd66d8540109c6c078c33b086e2a52cd7a1b35b91f23116084211b88a