Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ea6acc3e0d0564…

MALICIOUS

PDF

80.9 KB Created: 2021-03-20 19:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 263f88a072c815cb2145b5c21507e17b SHA-1: 23f75937e7c76c62c4f294770879676778c774ed SHA-256: 39ea6acc3e0d0564a3d981115e573762d0208944cfd4c32266341a945a2def38
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to external sites. The document body, though heavily obfuscated, contains a question that serves as a lure, directing users to a URL that is part of a larger network of links. The presence of numerous external links, many hosted on disposable domains, strongly suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://druttle.ru/strik?utm_term=why+is+the+blue+light+on+my+contour+box+blinking PDF link annotation
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/sitizalojufor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_601af5edc8d72.pdfIn PDF document text
    • http://im-marceting.site/tikoropoxapiremibqjiwr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402722/normal_5ff8c80cc8d0f.pdfIn PDF document text
    • http://allwoman.site/badlands_national_park_south_dakota_hotelsnf662.pdfIn PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/5a1ed67.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/dapudo_dotane.pdfIn PDF document text
    • https://mamifonor.weebly.com/uploads/1/3/1/1/131163935/nawinigexak-kitalaxe.pdfIn PDF document text
    • http://jakartapro.xyz/programming_computer_vision_with_python_oreillyl1z2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_7e85b654715d4a72b0f09de5ad0213dc.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_74e53dd421b344e29a5b93c14c0de889.pdf?index=trueIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_49493f3d826c4b9f8b40d1146406a3cf.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_ba1e65399e3a4ff5a8be68fa76fc4512.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_5c4650ea0b28496a8744e33da0e3f27c.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_1a65b7a81ad94cd99da1968b1c48a77b.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_f6c68e5c85dc4e7dbbc1715b3af06055.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_f7ed68ff125c42678ee1b6dc5d07f8c9.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_c0a18d4cebc84cf69765cd29a1b149c8.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_baab589e198d499a9b7ef7690982ee7b.pdf?index=trueIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_f2eedd8d2d894671ae86a86a96b1278b.pdf?index=trueIn 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_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 5388 bytes
SHA-256: a2987d712379629a6cdf5d38f2e1f6c3d03a0cc13ea1a11cc4c2e9d4ce0dfc23
font_01_sfnt_off00010f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 11340 bytes
SHA-256: 389e992b75651f725c1a83d198c9302092f019762d9aadccd0e249e8304e2f69