Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a02366c04f8effb…

MALICIOUS

PDF

70.7 KB Created: 2021-01-01 19:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 39d2d7eff58612108ed1551217b7c156 SHA-1: bc18195f63daf1b2e488d2cff49c6284640d52d4 SHA-256: 5a02366c04f8effb9906e7c45af7ca4c7a616aa63c92ba204f718973644254b4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. It contains an embedded URI pointing to 'trafficel.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to downloading a 'mod', suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=download+followers+chief+mod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5fcf01d090dd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fe0d580d107d.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/aggKPW6/bozutubudirepuxoxup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418993/normal_5fec8bba0515b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fd60d486155b.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/c76afbc6-da29-473f-b6db-5c52dad8d171/loci_worksheet_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac58b9e-0af1-40be-a4e0-f6b0b6a452ee/puggle_puppies_for_sale_in_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9895b7aa-fbf1-4986-9ce3-622c70701699/46742417786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da0567d-74a9-4292-81b7-4f917aae1e94/bikukulorejobokofika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd32e64-1c91-457a-8e2b-b5c07142c59d/dofematijurogofojanin.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/google_play_services_apk_download_for_fire.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_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 5352 bytes
SHA-256: da50ee83bec11337fe88847a128d6577068bead1e3063f2c87e435c6da11bc5c
font_01_sfnt_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 11840 bytes
SHA-256: a2616fb8108fcba2604fa3106c45fc2449d8f89d2fe789000f2af872ab2a5b98

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