Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54616ae51f3051a…

MALICIOUS

PDF

75.2 KB Created: 2021-02-17 15:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 022e6b81e6659e265a53bf238581b6fd SHA-1: 39c5cd5895ad284d2f3d5a54f92e073732488ad1 SHA-256: b54616ae51f3051a809683913b904a12245edde0507c4ebb67a687ce37b04aa9
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, includes keywords like 'Minecraft glowstone dust farm' which likely serve as a lure. The presence of numerous links on disposable hosting further supports a malicious intent, possibly for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=minecraft+glowstone+dust+farm In PDF document text
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/3857259.pdfIn PDF document text
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/zujenone.pdfIn PDF document text
    • http://doctora.club/leed_ap_bdc_exam_preparation_guideeedvu.pdfIn PDF document text
    • http://hookup750.website/916886237989cg0z.pdfIn PDF document text
    • http://buylettersonline.com/play_store_ko_karewmivz.pdfIn PDF document text
    • https://zevugakarexavak.weebly.com/uploads/1/3/1/8/131857252/6341266.pdfIn PDF document text
    • http://j3vnci4.xyz/bsaci_guidelines_nut_allergydwrz9.pdfIn PDF document text
    • http://iuts.space/answer_to_congratulationsf2vs4.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/bujabujodosaga.pdfIn PDF document text
    • http://vengriya.space/zoxux8yrmo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatidewivi.epizy.com/midejizafenerenekenulajev.pdfIn PDF document text
    • http://zifofupox.rf.gd/donkey_milk_sheet_mask.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/twinkle_twinkle_little_star_piano_chords.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_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5440 bytes
SHA-256: 505845b77f233cf09bc13bdaaa37b54bff647645e66ad0501f0760caeeed4d4c
font_01_sfnt_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 10020 bytes
SHA-256: 4f81f6f7d927b229498dbef88bda8d3f1b9c9741ba2836f23328af1e5c10938b

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