Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae24680323dbe5b…

MALICIOUS

PDF

67.3 KB Created: 2020-11-26 03:35:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a435a7d89db671d18b11e2069585b2e0 SHA-1: de594fdbe3a6cd13fc6279102458675be70875c2 SHA-256: eae24680323dbe5baf721e958f7356c20296db6147959b950e1371ebe8612dbd
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://traffset.ru/strik?utm_term=jg+ballard+atrocity+exhibition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416802/normal_5fa006d14374f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f92af52c09ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5faa0703e37e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f9e31b3e6c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_5fa4ad90adc49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f92ec8f06383.pdfIn PDF document text
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/gulilapubuvavar.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/zawogo-betese-bofopipef-zijopawab.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/d4f937d4-086e-4937-906c-8be2c5a3f26f/16243231455.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/dolavivedufiminox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57fb4441-bb32-4153-bdd0-7570baa4c461/binogiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d91248d-ef9f-4aca-b189-f0c61338e801/nojenaborexaxijekifabaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/cooling_tower_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b94542a-3aa5-4396-a15a-df9b68cab1c4/malhotra_naresh_marketing_research.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/championship_manager_03_04_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ed656c-9e3a-4bf3-84ca-32036daf6780/85838446966.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_off0000c95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95D 5540 bytes
SHA-256: b7f2673fad6fa9e28119dd73c423be028774ff5798266a590ebb9829bbcd8745
font_01_sfnt_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 10648 bytes
SHA-256: 2a59253e2129b3f46304794d451e62557d1cdd3783a1a3c27d286326b6f395e1

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