Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3c3b84fdf3b56b…

MALICIOUS

PDF

73.3 KB Created: 2021-06-10 10:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f0d6eecfd497331fc7862fcbfd5eef0 SHA-1: 2089afcc023a5fa875c030dc6dd17eca98b9420d SHA-256: 1f3c3b84fdf3b56b799eb061d4bafea516dbabebf6f8adfafd873a6fa874ceab
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML model, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous external PDF links, many hosted on disposable domains, with the primary lure being a Minecraft launcher download. The embedded URLs suggest a phishing or scam campaign designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/pbw?utm_term=minecraft+pojav+launcher+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490121/normal_600441648f6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_60b7c37d8bbe4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4458849/normal_60b1e91e19f14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_604d074fb3054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_6023cfbfb0ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_605bbffded379.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4494165/normal_60aff607eea40.pdfIn PDF document text
    • https://wonefosobafig.weebly.com/uploads/1/3/4/4/134479447/wuraxikaw.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4366000/normal_60b2964f9e8bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6046f4f89f5a9.pdfIn PDF document text
    • https://ginamorevuj.weebly.com/uploads/1/3/4/3/134392530/xalenoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_5fd92a30d50a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff13efd30b49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499660/normal_5ffdd4b67ad89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6014022040fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_60666522410c9.pdfIn PDF document text
    • https://zamomojufowa.weebly.com/uploads/1/3/4/6/134613680/sefepivoluw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_60bb8f58a9756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizovitunex.pbworks.com/f/tolopajugaramega.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144791097/adobe_acrobat_dc_pro_crack_mac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E6 5296 bytes
SHA-256: eeeca299842108b31ade2ebc4580cf3b4b4976a905701ed82f40a5b007c65e2a
font_01_sfnt_off0000f40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40E 10584 bytes
SHA-256: 252b51aa1758e4cb25928c4098b9d72ae2203020df574ce7625aaf34c10244d6

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