Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3228c10837ae963…

MALICIOUS

PDF

85.5 KB Created: 2021-01-16 20:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c1e57a260afaa900375e18e95c0c2e5d SHA-1: b3d119280d08952be6fcb6f97d6b8a04ca3ac319 SHA-256: e3228c10837ae963e0bc1ed65dbe1f58bb8c6f486823b57d836629468fac5edf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document body, though heavily obfuscated, suggests a lure related to a scholarship program.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://traffnew.ru/123?utm_term=unmet+need+scholarship+program PDF link annotation
    • https://site-1227746.mozfiles.com/files/1227746/pemorixivilobagogobu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5feeb9afe42c4.pdfIn PDF document text
    • https://site-1167953.mozfiles.com/files/1167953/fuzejifajixag.pdfIn PDF document text
    • https://cdn.sqhk.co/nalogigoke/gNjiZoY/dupumalegajumupuxemalo.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/paxunu/visual_studio_code_platformio_include_path.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/pokemon_tower_defense_games_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/beta_thalassemia_trait_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/4-2_patterns_and_linear_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/64508007348.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_off00010ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA5 5480 bytes
SHA-256: 100daccbf9ad5e090a4e50cc2bb88e35e98279458feaf9181f348828beabe844
font_01_sfnt_off0001211f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211F 11908 bytes
SHA-256: c9922d17af28b65087e346c01c15be6065ac040eec0065f2ab3e046f12e1c638

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