Malicious PDF — malware analysis report

Static analysis result for SHA-256 896fcf47ab8f55b0…

MALICIOUS

PDF

98.4 KB Created: 2021-06-08 08:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 21d395a5693fbdafa51f54ce49495558 SHA-1: 04c4f9d4217141bfe6ce3eca7461fe49504a212f SHA-256: 896fcf47ab8f55b0cc171efc21786d6199d6866f57a7a394a4aa719fa1957df1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious activity, likely aiming to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://oniceh.ru/pbw?utm_term=erupci%25C3%25B3n+acneiforme+por+corticoides+tratamiento PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501193/normal_600f9bb2dc846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_605d2b6588e8a.pdfIn PDF document text
    • https://xatufatug.weebly.com/uploads/1/3/4/5/134597760/litom.pdfIn PDF document text
    • https://jemodenot.weebly.com/uploads/1/3/4/5/134528334/zomokovafovosut.pdfIn PDF document text
    • https://xulowipel.weebly.com/uploads/1/3/4/5/134594063/polobemiwur-balixa-wuwudoxof-jolujiligifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_600b64e484dc4.pdfIn PDF document text
    • https://vosaxoro.weebly.com/uploads/1/3/4/4/134469305/9275016.pdfIn PDF document text
    • https://lujetuzamuja.weebly.com/uploads/1/3/4/3/134372728/1200795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_601eea431948f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5df940f6-f799-4c19-b999-4dbcaa38a523/14931839334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3762400d-08dc-44c5-bc2f-62ccb034a5d7/apex_legends_error_code_30005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b76951e-a6ce-4d50-a512-2c98448c8c5a/zonajipuvufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59202020-f538-46e4-ab90-4adf28599f35/tubedokegowesuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a93d7bd-0955-4881-9407-090993cb3b4e/graceful_ghost_rag_violin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd478ab4-7bd5-4c56-87d9-f7c2590243d9/59465804769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be69863-15d4-455a-9117-39da8ab8921e/21760480667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f7c69b-da17-473a-b482-5024760955c0/71302434172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a7d3bd-593e-43cb-baee-7aa603940167/nomowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f262fb-e880-46d5-98d4-4f39680224fa/employees_supervised_means_on_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe7518a-5439-45b2-91e7-7000804df2a8/jizejuxurogu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13323 5244 bytes
SHA-256: 2ccd9f9b73c3cfff8abd3eac9e287e1df844c0a11eb127e39233995e06fc7b89
font_01_sfnt_off000144a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144A0 12096 bytes
SHA-256: e360f510c61d3f0f0b2d9d0a227b04a56cb0d45b81a9e20354f63c3d0b5e43af
font_02_sfnt_off00016b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B8D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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