Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59e8a135e62fb14…

MALICIOUS

PDF

84.8 KB Created: 2021-02-20 22:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 3266b503f6911de649acea245cda47ec SHA-1: 9c2f96f2739351805281505f7f17f867acbab2a9 SHA-256: e59e8a135e62fb14e9ad751b0fbdee44d4a69ba36a5c8b0fd3aca3c213a729fe
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a malicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'the sociology project pdf'. The presence of an external URI and the ML classification strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=the+sociology+project+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490125/normal_601327d34b240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5ffebc28e2cbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5ff6cf3fea523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_5fd67a1e77ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_5fd8156af22cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_600103728f02b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385852/normal_5fcc4e2d955ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_602f43d251d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_60206e2e8f9b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5fc61bd703951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5ff8edbe54b13.pdfIn PDF document text
    • http://ferejupaxebul.iblogger.org/32451587783.pdfIn PDF document text
    • http://zofazosedam.iblogger.org/xopaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/hcidhdo/95095178013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nijibibikij.rf.gd/15211699642.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/78784728229.pdfIn PDF document text
    • http://lidazadopedu.rf.gd/directx_windows_10_64_bit_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 5332 bytes
SHA-256: 850058aa43203194222a45c3743fef01297994f98952ad7d438c54c33fee9bbc
font_01_sfnt_off00011645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11645 2840 bytes
SHA-256: 5e381289a8754c27579ea4766e1d7b5257ec6e4cdf443b18f7ae26e4d522d449
font_02_sfnt_off00012248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12248 10460 bytes
SHA-256: 4dd7f64723b612677d159869c87f862ebf6710fed8c2a6f63583f0c5f774ac12

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