Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7f12ab2d561f47…

MALICIOUS

PDF

84.1 KB Created: 2021-05-24 20:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: af3707c1c97a0383ef3c806fced6dfe2 SHA-1: debde6f5c89cbf9ab6d8b785950d700bf49d979f SHA-256: 3f7f12ab2d561f47095f2b0965e66dd4810aeb3e8769c8b6a05898f7c9443909
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://ponafet.ru/strik?utm_term=win+real+money+games+ios PDF link annotation
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/a04aec75c91ff0.pdfIn PDF document text
    • https://gekonoxare.weebly.com/uploads/1/3/4/4/134480638/4288045.pdfIn PDF document text
    • https://pewukuma.weebly.com/uploads/1/3/4/7/134762228/purekojoxuret.pdfIn PDF document text
    • https://zatagigozot.weebly.com/uploads/1/3/0/7/130775916/teviw-pulijuxevow.pdfIn PDF document text
    • https://suvoneretalepa.weebly.com/uploads/1/3/5/2/135299969/5695944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/faxaxos/toyota_camry_hybrid_2019_review_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd48997-26b0-402d-9f57-0feb8e53617d/como_llenar_contrato_de_arrendamiento_de_vivienda_urbana_minerva.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/pdf_epub_to_kindle_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/best_online_icebreakers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df28b7b-ef4e-4dc5-8e3f-1a7e2b1b8b27/zunolumafomelab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f5c324-b4b3-4d30-a620-1f0ca49191cd/watagaberizejuxulonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3cd9da0-6525-405b-8b93-95fb88a7cf35/interesting_facts_about_samuel_beckett_bridge.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/adobe_indesign_cc_tutorials_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0313e8-c640-4516-a401-588d579dc5c9/martin_luther_king_speech_i_have_a_dream_rhetorical_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee17084-29dc-4d70-bb9b-63b874499a20/95752975957.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC9 5120 bytes
SHA-256: 004bef19360c9fa724d75ce291e354be122fbe1e87edf37028763820a4b3b55e
font_01_sfnt_off00010f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F28 2660 bytes
SHA-256: f25375f9d145506fd646ea1021c27f396c47852052a1f6b15c40731b26a60aa0
font_02_sfnt_off00011a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A91 11952 bytes
SHA-256: 29061518df2e81e77c9683be906eb55ec7f4f2734bee7021a8146c7040610a54

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