Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3aebb72534ac790…

MALICIOUS

PDF

75.6 KB Created: 2021-02-26 18:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a2397d90b2654693dde58c12d04019ee SHA-1: 1055e4ed95d78ae75abb0fbebd2916d7b3ded0a6 SHA-256: d3aebb72534ac7908692e14e1272436b50003f5afd3b80550be4349255899119
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://maypoin.ru/123?utm_term=monster+in+paris+songs+list', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest an attempt to redirect the user to a harmful site.

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://maypoin.ru/123?utm_term=monster+in+paris+songs+list PDF link annotation
    • http://it50life.pro/paxarmae9o.pdfIn PDF document text
    • http://runolive.com/407041789306rxsv.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/kageselugaviwaj.pdfIn PDF document text
    • http://torchland.xyz/44502973987mokcf.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/73039852491.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/82224194036.pdfIn PDF document text
    • http://greatholl.com/fejepoze4k5bi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_6004d55a4ac9d.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/garorowa/insecure_season_1_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/lepuvireb.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/what_is_the_average_salary_of_an_aircraft_maintenance_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/august_alsina_songs_benediction.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/high_mast_lighting_installation_guide.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/how_to_cook_baby_back_ribs_on_slow_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/sheet_metal_roof_flashing_details.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/15565687034.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/79054899025.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/aptoide_for_android_6._0._1.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_off0000edc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 4992 bytes
SHA-256: 117e8d87662a53504302b16f946c6c831f6399d5fc3fbf50947f4a539965b7d3
font_01_sfnt_off0000fedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDC 10068 bytes
SHA-256: d57a9d6bbbe24352f6b85942aacd4fbe304449340640c45a18642f0a803bf549

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