Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2122b347cca142…

MALICIOUS

PDF

85.3 KB Created: 2021-04-02 15:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1456c37fb08c36c46ecd8a483cf59779 SHA-1: 92a6ba4734596cac63fc04dad34d55385bc30d9f SHA-256: 2e2122b347cca1420959f590f2bbfc44f04f931e0aa7c146ba628c9d8fa2a021
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure and URL analysis are sufficient to infer a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://seumenha.ru/wix?keyword=double+stem+cells+supplement PDF link annotation
    • https://cdn.sqhk.co/nepajenine/Yiahhhd/31931928128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468820/normal_5ff899447ee97.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/application_letter_for_school_admission_for_child.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501995/normal_604f3d688c0b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fcacde5f1fce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcb2ca8529b7.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/duvosuzajil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_5fd2cf809c168.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/hAO6zlU/moto_z2_camera_and_flashlight_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/yarn_color_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_602b2a4368eef.pdfIn PDF document text
    • https://cdn.sqhk.co/lekabadixi/nEghagX/beatles_complete_scores_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_5fdd93d176736.pdfIn PDF document text
    • http://woronari.getenjoyment.net/indian_vegetable_dishes_for_dinner_party.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478146/normal_5fcae7b3ca494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5fdc55c78ea05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vukenorap.epizy.com/jivizorika.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_c7d4ec0b4c0f482fabd08a7b60da0d17.pdf?index=trueIn PDF document text
    • http://xikebivulusures.rf.gd/las_mejores_aplicaciones_para_android_tv_box.pdfIn PDF document text
    • http://momunubaj.epizy.com/climate_impacts_on_agriculture_and_food_supply.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_0e0dc84ee9a34753818ce04abc6af712.pdf?index=trueIn PDF document text
    • http://vukigopi.rf.gd/wojowibukeduz.pdfIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_b4e750e8d5f64ad580753ded8c2835d0.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_185c8d5446f74b3c88a23a8173a1bc88.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 4912 bytes
SHA-256: 9c49ef11788f8b4b5c96df4dc7437b45a84c975c28d84ec9f59defe6a896a847
font_01_sfnt_off00010a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A60 11204 bytes
SHA-256: 3213b67d890e75f1b18285f3ba2ec719bb0235f4241595a651f0df07de36d3cc
font_02_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e