Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7da9bdfbe7db9e…

MALICIOUS

PDF

70.8 KB Created: 2020-11-28 05:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5723d929c4ac404ebf600c6a7dedc1ac SHA-1: dca418fb4e691361803c4c246d07162cb36e8d43 SHA-256: 5f7da9bdfbe7db9ed41aacd2cd3198aafc975fddc08355086e2029594f4b5ea1
156 Risk Score

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 0.9997

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://traffking.ru/123?utm_term=what+happened+to+sister+charlotte PDF link annotation
    • https://zazetafulunemu.weebly.com/uploads/1/3/4/5/134599809/51149832.pdfIn PDF document text
    • https://lapufetugez.weebly.com/uploads/1/3/4/5/134599929/xizanemevumerijezeza.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/rivazixexuguri/court_street_movie_theater_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/sample_personal_statement_for_scholarship_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c501255e-ac58-41e5-ad72-b06a668b17ed/64388566336.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/85673395587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16e6b3d-c686-4649-96e6-5922da21ad97/31439620793.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/raste_raste_chalti_banasa_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/73306380185.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/green_gown_guide_hku.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/10689889293.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/mibajusopixu.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_off0000d787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD787 5176 bytes
SHA-256: 50798081ee64539e68aea1ad86c2765ebdab0611614f148e68e8d16005309a2d
font_01_sfnt_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 10848 bytes
SHA-256: 6e731573ffeddf31f9a87e98ba0207d8bc162abdd4709887c4c35d3d0562d57e