Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee90e7135d06ac98…

MALICIOUS

PDF

68.6 KB Created: 2020-11-11 08:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 864c17b2e5f90354b342bd66c04f8f8e SHA-1: d470244253726969b994adc9cf5db5abdedf7f5b SHA-256: ee90e7135d06ac98b9080f6a6336d8035ab2a02919a92e2b14aa11d2c8aca251
156 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 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 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.
  • 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://trafffi.ru/123?keyword=p0053+code+gm PDF link annotation
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/vuzetulubofowudo.pdfIn PDF document text
    • https://jejaxome.weebly.com/uploads/1/3/4/4/134443668/bugavafidu.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/161397.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/vigadi.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/b91a872f-9517-4467-99ec-6abf77a13bfb/ms_dhoni_the_untold_story_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193efdff-841c-4a57-adcd-49ed04b0b870/25587599368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724feff4-3e3e-44b6-823a-f2e3fceea6dc/donegidejekamolusarid.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/nobivaduvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2ab60a-5626-48e3-b127-be3c6ed15441/dr._kenny_baldwin_crossroads_baptist_church.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b820ea7-1ad8-45db-8490-ab0c4c4da7f3/95238692361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a17567-fd5d-46dc-bf1b-0bba836d501a/google_forms_examples_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0fc349-e6e0-4fd7-8c44-bbcbceed2f76/watimasuzinujigepomofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8e3389-4aa1-4df6-a1f8-d69686817150/55159034403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a6e1202-7bed-40a2-a6e3-8630088f134a/retaxujepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c959269-0f36-4a07-aded-32550180dc06/gulojulakorafijo.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_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 5172 bytes
SHA-256: 18e89875386f2780485d83ea1f0ec8d1886890d54330e41e0347d1ea075d0ae7
font_01_sfnt_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 10696 bytes
SHA-256: fbf19f80e4abd8608d963bc66d630053f93d7ebce9065056e83e16c22b55842d

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