Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2ba7774b1a6864…

MALICIOUS

PDF

78.6 KB Created: 2021-03-01 06:31:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4a0b5eb9e511c59cdccdfeb4994a6e00 SHA-1: 270de166911cbaf1bd6f0bb073f2fb99b3bd8a94 SHA-256: 9c2ba7774b1a6864bc6a460e9bb991052016e218d6449561acda13370e16cf56
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to an academic study guide, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=world+history+final+exam+study+guide+semester+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465687/normal_5ff6941d5342f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_603c53db14f91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421224/normal_6006005445609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fcea63a667d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423715/normal_6007e44e11f75.pdfIn PDF document text
    • http://zerkalo-fugicar.website/dnd_5e_ballista_ruleskpvqf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_6032754a18f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_6025e566e860f.pdfIn PDF document text
    • http://mishgen.com/suvewomizeroo8i50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371786/normal_5fe528687e866.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/8751374726nfp5e.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/luxaduzimase/60288223190.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/kasusifiwimojupuk.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/pugameberarijugubamefu.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/76262386448.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/egyptian_electricity_holding_company_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/21461795289.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/base_form_past_simple_past_participle_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/28970953026.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/2013_chevy_malibu_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/actor_who_played_bat_boy_in_the_natural.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/poxajif.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/wenepaxezad.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/gas_detector_installation_guidelines.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_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 5636 bytes
SHA-256: f368fb5db35d5c74aa26bf9090c3b93a12e6076296dcc4a3088df3ca80d1f2eb
font_01_sfnt_off00010985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 10208 bytes
SHA-256: 07624f41c9896eb7dee51970c2be5c01e1fb79fb87d47fe0fd7f938755ba9e58

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