Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3276e906c20f5e6…

MALICIOUS

PDF

79.4 KB Created: 2021-06-12 04:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cca436d61e0f64373dc151f25e359f09 SHA-1: e47884424f27560e7b5381450dd4fdaee93e4ad3 SHA-256: c3276e906c20f5e60f2a61401108595408656f24b83cb9bae70d5988a850ac5d
156 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, indicating a high likelihood of malicious intent. The file contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. The presence of external URIs and link farms points towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://irlanc.ru/uplcv?utm_term=vidma+screen+recorder PDF link annotation
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/5kf9ruptmn0e3f9bb0tqfor0f4/64640712995.pdfIn PDF document text
    • http://lblussana.it/images/file/14260969644.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d607de8048---rodokazibitegutetefejob.pdfIn PDF document text
    • https://coil.hk/upload/files/43111723725.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608226e283fba---27109744578.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0a7dd8tsf1ahiqgkem9mt5l6oi/fejixijoruju.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/datudijimezis.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1850c1d653a9f2752872a883e820703a/gelozixur.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/sco0hgehhuqdthu46oc0hjfuqf/nizixezaselekubuvam.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d29661cf4---4798208376.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160addc8b6505b---30298425440.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608229d869000---63345506251.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/61522040444.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/6b3a049c05523b5c4011886d6f3ec16e/2137147480.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0000f163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF163 5020 bytes
SHA-256: 6020311557ff96cbbb835285e57c6d9ad541ac2f509a93ac546ebfa125c1a975
font_02_sfnt_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 11416 bytes
SHA-256: 1922e7079083bf4bbfd60d22de9694f76e9b4d455e87876dafea2fe9ee59abb1
font_03_sfnt_off000128d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D7 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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