Malicious PDF — malware analysis report

Static analysis result for SHA-256 21259e96cce457d1…

MALICIOUS

PDF

79.2 KB Created: 2021-05-23 22:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b046ea0c75ecc47cd885fe8525677607 SHA-1: 555f23ae89b70fb562048e8c5292746a485d25b7 SHA-256: 21259e96cce457d1c7364d3da68666f8e461b88fc7ea9030fb470acff6f5b2ce
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a phishing lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/strik?utm_term=how+to+use+self+clean+on+a+rowenta+iron PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447433/normal_5fece5e3a8367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_602d631276350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5fdfd862804b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379987/normal_5fec035a1dbc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_604a94b7e1922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_5fdab944c255c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377400/normal_5fc9068dd0b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_6023c241b651c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_604cc10022831.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/709450c9-c3c6-48f2-bda7-df31be610db8/how_to_change_honda_odyssey_transmission_fluid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74730a90-297b-4e56-87ee-9d2deaf16bd4/brain_and_behavior_garrett_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/alfabeto_coreano_hangul_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/walt_disney_world_epcot_fireworks_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221af6dc-ad73-4557-b758-90ddc4ac62d6/logic_x_10.4_system_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732f651b-c09a-4940-a577-3eca56abcbc4/zibevavo.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/kugesoxatonivel.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/standard_size_of_asbestos_cement_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269225fc-6232-4ce7-b54e-adbfe6b9be02/9432820958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394946cc-ba1c-4aab-a9ac-0da1c3988f80/zalurixijonulukonegezok.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/70249739620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d25fdfc-ed4d-4839-8263-d624415473a4/hoover_windtunnel_t_series_bags.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/best_artificer_feats_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6eebb5-9a7b-46af-a120-01f685975e5e/conversational_english_teaching_online.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_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 4928 bytes
SHA-256: 1f1e2c23e4d920d782d3db0cf936b238f57bc5333dbbcdb4e6f907fcd656b125
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 11028 bytes
SHA-256: fc7c8b9c308d763b20589dbae221bd6191243fd6625dfea9e23312e9c4868d3a

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