Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b222775021a1f4…

MALICIOUS

PDF

74.5 KB Created: 2021-01-30 10:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 20436b9f500e7a904211d6dbf2c7391d SHA-1: 7bdd4e0556e9695bdc5091a566120ea3be7c1a05 SHA-256: c4b222775021a1f4d7fec0e0325d52e70a9956f513facaddc58e2e4c05622bd3
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a site offering cracked software, and a heuristic detected a visual download button, suggesting a lure to trick users into downloading a payload. While no scripts were directly extracted, the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=pandora+premium+apk+cracked PDF link annotation
    • http://zoo-taxi.site/54291232042fy9gi.pdfIn PDF document text
    • http://youralteragoods.com/farm_heroes_saga_cheats_unlimited_livesrfvc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_6009f9e8abe7a.pdfIn PDF document text
    • http://bnl-jobs.com/fuverisanadetolalavanitusxy03.pdfIn PDF document text
    • http://ig-objectionform.com/runnings_hours_willmar_mnb4mlx.pdfIn PDF document text
    • http://ketrovk.xyz/como_ser_um_conservador_roger_scrutonoaw3g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5feda8a688fd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467277/normal_60051060b8f23.pdfIn PDF document text
    • http://playmarket-online.com/free_wood_carving_flower_patternsxv2jh.pdfIn PDF document text
    • http://ingmijn.com/53899691420fk8mb.pdfIn PDF document text
    • http://robinmani.site/zong_free_internet_coded7m7r.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/debamijizozexo/46909727463.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/chiltern_district_council_planning_application_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/beat_production_software.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/ccss_math_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/febaxolawutofuze.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/corresponding_parts_of_similar_triangles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/11210764196.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/65814982951.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_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 5072 bytes
SHA-256: de5c02cfe69f1746128f3db25a5a937b2f790b0785834d7b9352862a8943e538
font_01_sfnt_off0000f454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF454 14348 bytes
SHA-256: 812d0d16fc40ddb12c9078888a8c3c63e125b22cb00e939d1ede143fdbe0c057

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