Malicious PDF — malware analysis report

Static analysis result for SHA-256 2328febdde4efef8…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 12:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 965cb67487c3523e62364da344314c22 SHA-1: 7886b9a38e30218ad140280b9a1ba5e5082d9e41 SHA-256: 2328febdde4efef8187aea3d23cab0e6a1ddd0cb24e5ab3ef39facba6c29d286
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with phishing, and the document body, though heavily obfuscated, suggests a lure related to 'transition phrases for essays pdf'. The presence of multiple embedded URLs further supports a phishing or credential harvesting 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://druttle.ru/strik?utm_term=transition+phrases+for+essays+pdf PDF link annotation
    • https://cdn.sqhk.co/genopeno/Chagddf/rigal.pdfIn PDF document text
    • https://cdn.sqhk.co/lipetebo/RbosidE/save_girl_child_poster_with_slogan.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/ajhhhhg/kigepopamodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5fd3a0cd4350f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495042/normal_5fdec6753f95c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402712/normal_6000c72ff3fdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_6025a580e10a5.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/ayhj2zw/ratadiraxosanamekutep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_600efbaceabb9.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/gdbhc2U/minecraft_slenderman_mod_1._16.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/manualidades_de_bruja_halloween.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/dorulusof/consumer_reports_mattresses_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/rewus.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/early_adopter_program_guidelines.pdfIn PDF document text
    • http://povusesa.rf.gd/52256409285.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/llda_smr_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/examples_of_electronically_stored_information_esi.pdfIn PDF document text
    • http://kubivakov.epizy.com/android_tv_box_uk_review.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_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 5148 bytes
SHA-256: a87f25bb5ba5d54c4e9445e847e683c7bd2d28e8b498c22eeb68fa1031c88a6d
font_01_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 10608 bytes
SHA-256: 56b914f244b7e31172d2c0debdb894185361a67c642e630e278045c4e66c8aa4

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