Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cad2b9e1b98006…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 19:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83ddd36e267f50891fc0445a96747ec8 SHA-1: 99c7108209c11690bf677f4c43850735e6abe232 SHA-256: 94cad2b9e1b98006abac26355b64cc23410347d07454d766b03e0861074da07c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to downloading, suggesting a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=apgar+score+pdf+download
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/xomedu-xonapa.pdf
    • https://cdn-cms.f-static.net/uploads/4404730/normal_600a667e6af16.pdf
    • https://cdn-cms.f-static.net/uploads/4417988/normal_602efcc345978.pdf
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/vufam.pdf
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/2083613.pdf
    • http://novazeku.mygamesonline.org/kajifigexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gusule/9822421465.pdf
    • http://kedisijusa.onlinewebshop.net/microsoft_projects_2019_download.pdf
    • https://uploads.strikinglycdn.com/files/b846436e-cba3-453b-ba1d-0036459288b5/how_to_speak_english_very_well_app.pdf
    • https://s3.amazonaws.com/zalisujezajaje/12084343022.pdf
    • http://nukuzuxowilaz.epizy.com/reliki.pdf
    • https://uploads.strikinglycdn.com/files/8e7c6e22-05c2-40f0-97b2-69e002e48a2f/fisher_price_rainforest_jumperoo_instructions.pdf
    • http://tiwadelir.rf.gd/shading_techniques_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec51.bin
d4f8f01f6e9f790c51305f2d08a69ca38dd23dd3cd54294866af66b1c0bd5fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 5404 bytes
font_01_sfnt_off0000feda.bin
55941c0f669adec7443e151f5c104e743a7f6eca99905f2dd53def5671e55dbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 10968 bytes

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