Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9a3259a2f54bcb…

MALICIOUS

PDF

81.9 KB Created: 2021-05-24 19:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9d2febcdf3f090adc186137af71c8cbe SHA-1: 2271c19aab1092d06e39d1be54ea84141c3e5166 SHA-256: 5f9a3259a2f54bcb2cec3cfec44afcf78095872be09f598b11561ba35a9930ef
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a download link for 'lego marvel superheroes apk data'. This URL, 'https://seumenha.ru/strik?utm_term=download+lego+marvel+superheroes+apk+data', is highly suspicious and likely leads to a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=download+lego+marvel+superheroes+apk+data PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461770/normal_6061f27690b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_60414f0149f8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366964/normal_6006b14bad1a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489263/normal_606e77f7cce06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_6052386a82692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_604aa8b34a795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_5ffa77603655e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458827/normal_6054e9f2c32eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e201247a-aad2-4f23-a9b9-f3cd94b93681/31899495888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947008f5-fe4d-46de-bfe7-83203d5efb0a/lejugot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43210949-1862-4ef4-a61f-d3bc59b1bb0e/how_to_start_a_music_production_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9ce562-3238-4b20-b062-c8f65157ca39/lobironekaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe61a7e-4933-4b3b-a501-b06285398d50/jutiwuzemigavotegiwuponi.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/xawotudorubibidasom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b333da3-689d-41bd-83bb-f7c021ff642f/detiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50328874-9779-4462-bf8e-77e92ca941e3/pavilixuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f2e4f0-f183-4e0c-b884-66f85b928d48/zamud.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/baaghi_2_movie_hd_tamil_dubbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/058b462c-2ed2-4ac2-8a35-5b2c4ea64eba/what_is_the_price_of_i7_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04666cc4-2cd3-46bb-a966-dc32742fb0ec/franz_kafka_complete_short_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/conjugate_acid_and_base_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4affd934-675a-48a6-b76a-c3ad0ab9edcf/kenmore_700_series_dryer_troubleshooting.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 5424 bytes
SHA-256: 1e619d0e4c48d788ae3a715f3b954a9673a56f8ee4bb5d8298d306be2d87b22b
font_01_sfnt_off0000ffc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC4 18700 bytes
SHA-256: 1dc434c1a63c8c48005a70f88cc8db184612f4463e44d5730edf84249ee49886
font_02_sfnt_off00012b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B79 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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