Malicious PDF — malware analysis report

Static analysis result for SHA-256 451c6fe8c094acbd…

MALICIOUS

PDF

93.8 KB Created: 2021-05-25 03:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6b8a2c312c00e73840ccdc84503cc765 SHA-1: a831a3ba3cf0c5e849a434b3b48882ed4a205c98 SHA-256: 451c6fe8c094acbd2932f198890005d0dc6d30defbb8f095b60819dd6142fbd6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a malicious domain. The document body, though heavily obfuscated, appears to be related to a game strategy guide, suggesting a phishing or social engineering lure. The presence of the malicious URL and the ML classifier's high confidence score indicate a high likelihood of malicious intent, likely to direct users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=simcity+4+deluxe+edition+strategy+guide PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widuxade/combining_like_terms_with_negative_coefficients__distribution_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/zarchiver_pro_apk_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/840573218.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/bubbleupnp_apk_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/guredafaxikaful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26da0233-7ac2-44a2-91bf-3fd0dfce8e1a/troy_bilt_tb240_spark_plug_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde60247-ec4b-431b-b438-6b35efcac00c/mossberg_930_waterfowl_12_gauge_shotgun_85128.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/mikexixumigotaxupoxamik.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/html_css_set_table_column_width.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/dell_r730_memory_configuration_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4583ba-5a59-43bb-8125-f074f6c5d031/what_not_to_eat_on_a_cleanse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd258bf4-f495-4242-b3e1-08e739944eb6/minn_kota_power_drive_v1_foot_pedal_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b385074d-5546-4b31-8a7e-6c6d2f1c81b4/66644568718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2952c844-3311-4d4c-b999-d860baac725c/45747057151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f80e62-2e51-428f-8f67-e50b4cc3b39a/krups_la_glaciere_ice_cream_maker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/modinagamebatilo.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/kikuzoredizok.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/zixinixudibeti.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/42368183744.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/jerebutomotudufit.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_off000130f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F4 5620 bytes
SHA-256: 4437327dff27725c4ae32ba59d00b6342c9ee8c738d3b2e77a04e82394c4170e
font_01_sfnt_off00014413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14413 11160 bytes
SHA-256: 5a5d09b283a36835700cb38019056b96bd8446c587ada712c0b2944606fe0069

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