Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab87578ffdda2cf9…

MALICIOUS

PDF

76.1 KB Created: 2021-03-19 21:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f232c8f1e3ec5df575353a9779742f7b SHA-1: 5ba51db95d8eb63d395ad821acba34a372901efe SHA-256: ab87578ffdda2cf9780aef8e161621ef82fd036a443b5cbc833c276854391598
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=fun+algebra+worksheets+free PDF link annotation
    • http://wixiziz.iblogger.org/toxegu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fd03431b213b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_603431db41d91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478398/normal_6002bca4a76dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380229/normal_60036ca70b97c.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/wipizigapepalifizex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_603e811338413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakapenabu.atwebpages.com/nubomozijixigokufaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b088f9-fce8-4ad4-9d18-a59e84fd469c/define_economic_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb3041b-c6a6-4cb9-838d-40522231aa2e/dyson_dc25_hose_extension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bda3e7f-2a51-4764-8e35-91257ae9d7bd/32848325276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0676eb-c33c-442d-87e1-2a3fdd09a78b/institutes_of_the_christian_religion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d33e87-d68f-4ebc-a892-a3e4353d82e7/53487027837.pdfIn PDF document text
    • http://dakezemafatelo.epizy.com/belajar_bahasa_thailand_dasar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3ea31c-a89a-4429-b135-aecc18eaa63f/nonviolent_synonym_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23bedf25-53be-44ba-91a3-b720ccb36823/pawod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ef6a1e1-7c21-4d0c-ac84-d0f274bfeab1/31574335424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041009a3-051c-4410-9491-2e8b611846e6/35232285785.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_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 5280 bytes
SHA-256: 301822037ec691f101facbd611a316a47564857d392ca89e2a93c816e3044e3f
font_01_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 10248 bytes
SHA-256: 5bd1c93119e60e14551bc330e60c810ec2f0f65519a6959361557efc9501a0af

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