Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ed88ebb37724ae…

MALICIOUS

PDF

117.7 KB Created: 2021-03-21 21:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 32285efaa9514c198a2e297dc6e43903 SHA-1: 24c88630f4843cb7e2cbd71aebc1b0ad26774d72 SHA-256: 83ed88ebb37724ae369fb2541eceaed040652fecf472ca917af1499ae14426a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=aafp+hypertension+guidelines+2018 PDF link annotation
    • http://mawosatejojeka.sportsontheweb.net/25965097999.pdfIn PDF document text
    • http://itawegan.space/16944796081cfnrb.pdfIn PDF document text
    • http://ital-tess.space/89507481779bq5my.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/10th_class_science_question_paper.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/1217151907.pdfIn PDF document text
    • http://ranking-se.com/vajilazijofuwigetivg21r5.pdfIn PDF document text
    • http://wawesoja.sportsontheweb.net/sermones_biblicos_para_predicar.pdfIn PDF document text
    • http://susurrus.space/bodybuilder_arnold_schwarzenegger_photosvimff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7234031-b7ba-4fa3-8bdf-71d8a692248e/71692430628.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_d16975cd21864b55b01cbbe86f2ef9ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7012f028-ed26-4e69-afc8-4cdce67aedbc/pudanixadarakarebugafapij.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/noxozomojogepopuwixa.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/bechainiyan_video_song.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_6215638b2e1c4f02919b35c01b4895d5.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_9034bbd277444a8e97dab0dc0acf5340.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_4c038991458d49af97d186d72bb61fca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/bluestacks_4_new_version.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_7d1ea13a51ae4ad88ad0b35c2b756aa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/857b4078-46b8-4e54-a74a-e4eaceadb00a/thank_you_jesus_for_loving_me_song_with_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/kezulameko.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_off00018a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A8B 5916 bytes
SHA-256: bf7d3b99261a44b537e8c79b03afe52c7f4d7a32b6b2db8ed7bd90163f9147b8
font_01_sfnt_off00019ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EBB 13076 bytes
SHA-256: 6678a2ce110f26c05b0de3e2d2d2fbdddf0da82fbd46cb90ad32f88df1e4e727

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