Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5fcd2bd2d196dd…

MALICIOUS

PDF

87.1 KB Created: 2021-04-19 04:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 61bc471cbb81fda6ded9b9cdeb77b62a SHA-1: 7818e3991ada370f67d5f5904f627158bf53c3a5 SHA-256: 5a5fcd2bd2d196dd69f0512d646529bda1258104b983d52efea13282b6e45072
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with a critical heuristic identifying it as a link farm. The document body, though partially corrupted, contains a lure related to 'royal caribbean beverage packages' and mentions 'wkhtmltopdf', suggesting it was generated programmatically to host numerous outbound links. The primary malicious URLs identified are associated with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=do+royal+caribbean+beverage+packages+go+on+sale PDF link annotation
    • http://muvirire.22web.org/bioplastics_project.pdfIn PDF document text
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/efb12f7ab0.pdfIn PDF document text
    • https://zizonilorixu.weebly.com/uploads/1/3/4/7/134772478/makajo.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/1668604.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/gikuwojike.pdfIn PDF document text
    • http://kuxuzozemoloxiv.22web.org/gloomhaven_forgotten_circles.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/sojebelevenex/abkari_vibhag_rajasthan_online_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd65f8cb-8c07-4a67-aab6-a1e8807d4db3/echo_dot_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/harry_potter_quizzes_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/xparticles_2.5_serial_number.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/sewonivot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be11eb08-aa79-4102-bc46-903f67c94b69/91180241641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380e5ce9-8d7e-4b74-9000-5d26b5723b19/kenmore_elite_washing_machine_clean_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/55907342846.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/wowekaveguzisi.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/29359297912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db14b577-5986-4151-b0ee-ad400ae687ac/mugim.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/mozoker.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_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 5464 bytes
SHA-256: 0f946c978a390201133e64b0c6016e58f68c457f36ce024d4226b5d5f0cf28d4
font_01_sfnt_off000125f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F6 11664 bytes
SHA-256: cc9bf8901f88571a9833d68fcd6cf8c3c87681b58db673e893882a126ce8f864

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