Malicious PDF — malware analysis report

Static analysis result for SHA-256 b463c5e0160e92b0…

MALICIOUS

PDF

72.6 KB Created: 2021-03-30 03:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 253683c6a884e4798c3055f269eb5400 SHA-1: cc251401763aa7a8bed5868cb1f53be17233b488 SHA-256: b463c5e0160e92b0d1e0ffa3105bd2e69f35cf02e7ef225f6c1df290179720fc
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high-risk score. It contains an embedded URI pointing to 'maypoin.ru', which is suspicious. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

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/award?keyword=third+conditional+perfect+english+pdf PDF link annotation
    • http://bitejodimoni.iblogger.org/how_to_create_watercolor_paper_in_procreate.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/bopetiseg.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/resixexi/66305171995.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/24977312414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1133d70a-3ed3-4f28-b6b0-81a61cdeaee0/gufuwinejaragarirukapum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120822a1-b69f-4b5e-be74-faf2373c9b6a/54434318565.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/10785774559.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/kutotilosojumesiliziko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c990da-6dc7-4cb8-9e52-69b3c9e3fc39/merry_go_round_poem_langston_hughes_analysis.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/prince2_agile.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/base64_to_encode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/500264b8-6b9f-414a-876f-4d1c8752c3ea/34411057732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a696a4-b9c7-459d-905b-0a9edd422ccf/togurow.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/42706743718.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/pumerule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16aa5a1d-436e-40b3-8292-f857cc66bf92/nora_roberts_books_in_order_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/ham_radio_deluxe_5.2_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77f4b4b-0410-401d-bbb1-4fb69111ec85/5365802640.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/pexelitatumidamojosugazu.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/92267130401.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_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 5368 bytes
SHA-256: 4d82e77cbc6058c054adba1671211f09e0115ac27789c88ceae7f2971cc217e3
font_01_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 10728 bytes
SHA-256: 397f770ef77983eca5744cd6729026aaedaf4d3104ef784e0e1e83ae614c837f

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