Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ac85b240ea25d5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-28 01:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e4c6d501def216fdfbf26a7bbfa885 SHA-1: d64a08b96962288084b0c7388bb79ff9bb0a20ec SHA-256: 56ac85b240ea25d571a1ecdbfa27b208aae536e2da6379ef1042b7d547b50677
96 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs, one of which is https://ponafet.ru/123?utm_term=rules+of+playing+chess+in+hindi. The document body, though heavily obfuscated, contains text related to chess rules, suggesting a lure. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery via the embedded URL.

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://ponafet.ru/123?utm_term=rules+of+playing+chess+in+hindi
    • http://wewogokuwidu.mywebcommunity.org/15797386564.pdf
    • http://metazexepajesen.22web.org/studio_ghibli_sheet_music_for_viola.pdf
    • http://tijukilebag.getenjoyment.net/harry_potter_books_in_order_set.pdf
    • http://wurogutevifo.iblogger.org/zulilidemafikuxek.pdf
    • http://jedusajinud.mygamesonline.org/nemorafusupazax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pizuzol.onlinewebshop.net/6723272617.pdf
    • http://sogoxutagejuno.atwebpages.com/43498355342.pdf
    • https://s3.amazonaws.com/divikufifir/best_template_for_api_documentation.pdf
    • https://s3.amazonaws.com/joterige/country_with_highest_per_capita_income_2020.pdf
    • http://zexizel.epizy.com/jlg_boom_lift_inspection_form.pdf
    • http://kisezemewarajox.rf.gd/80798531615.pdf
    • https://s3.amazonaws.com/xebuvuwov/lurolaruso.pdf
    • https://s3.amazonaws.com/regovadeje/rakix.pdf
    • http://tigagatu.atwebpages.com/sat_test_dates_2020_results.pdf
    • https://s3.amazonaws.com/zerepuzuze/motivation_letter_for_scholarship_sample.pdf
    • https://s3.amazonaws.com/muvarelo/arundhati_tamil_movie_kuttymovies.pdf
    • http://wewepov.rf.gd/asvab_for_dummies_free.pdf
    • https://s3.amazonaws.com/bexolamabad/86133672618.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2ab.bin
609c99646e1ebb667f899c9ac5d63c26f36d8c261bcbf663b53c8a8c426fd138		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 5432 bytes
font_01_sfnt_off0000f53a.bin
0c874bdc9eca78c6e157299dbb050e83e6343f05b1495391412319de033b2373		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 10988 bytes

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