Malicious PDF — malware analysis report

Static analysis result for SHA-256 902c68e9b51823a6…

MALICIOUS

PDF

83.6 KB Created: 2021-03-28 09:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 50b32cefa82e8f391900fa38ec2a0a11 SHA-1: cc4b0d4760fe54e94625ddaa73c6ba0a58844f84 SHA-256: 902c68e9b51823a6bc94a990999cde85dedc710ac35ecf834d52498c2d13eef8
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://maypoin.ru/wix?keyword=box+whisker+worksheet+pdf` suggests a phishing lure related to educational content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used for delivering malicious payloads or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/wix?keyword=box+whisker+worksheet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5ff1217b16a09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369187/normal_5ffa4cf77ed68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_6018412e15a95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412396/normal_5fca124642f4b.pdfIn PDF document text
    • http://namelesssouth.xyz/aba_pairing_data_sheettpqwc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_606013a076dac.pdfIn PDF document text
    • http://appeal-ig.com/garmin_gps_500_manuals45el.pdfIn PDF document text
    • http://goldalbum.ru/probability_tree_diagram_worksheet_and_answers3i5nr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_6009016ab9c7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fcc8d7638d8b.pdfIn PDF document text
    • http://alex-chekalev.com/lekuredopalajigorolijepemrrpt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5fde4349c895c.pdfIn PDF document text
    • http://verification-help.business/fifty_shades_darker_movie_download_in_hindi_1080pthj6k.pdfIn PDF document text
    • http://nature-ital.space/30964963818t58di.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_60600adc27f51.pdfIn PDF document text
    • http://madamzero.com/nomerajiv5kkwz.pdfIn PDF document text
    • http://mosquito.codes/duroluxebesy6o.pdfIn PDF document text
    • http://help-bluebadgecenter.com/juwukezevepqvrc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464862/normal_60195aef73412.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f13ab9-e7b7-45ec-aea6-ade55fc1bd6a/pugeratoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ddda171-89a5-4368-b0e7-ad568406c82b/37892216743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cfd095-64ee-47a6-a650-ebf1580abc2a/85706103437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a900a71-3340-41c0-beb6-b4d8e8e7ad11/vizio_m55_c2_release_date.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_off00010b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4C 5160 bytes
SHA-256: 574f7b9dc7d178458386edec7fb3b01ff9672e80e34e8b3d6caa14b3a7874b31
font_01_sfnt_off00011cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF0 10464 bytes
SHA-256: b0af66afaccff4c7f11b64bf4ddbb01e917b5027d3ff825ab6ff00f311766404

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