Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b229a4381b6bf8…

MALICIOUS

PDF

75.2 KB Created: 2021-04-01 21:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ed27f261c6017bea27da7aa31bc507b8 SHA-1: ed8f67a91e13a2a3129bbe722b5121400dfc6d24 SHA-256: e3b229a4381b6bf8ad646a701b43740d0e17a25d54c1c58409979b24a9fec09f
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'https://maypoin.ru/123?utm_term=effortless+english+2019', which is likely a lure for the user. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and references 'Effortless English 2019', likely a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=effortless+english+2019 PDF link annotation
    • http://lady-bug.club/sifawoledazuzud76cpa.pdfIn PDF document text
    • http://kinoxca.xyz/axiom_pro_49_drivers_windows_1086g3u.pdfIn PDF document text
    • http://macsk.space/quaker_old_fashioned_oatmeal_microwave_instructions674lw.pdfIn PDF document text
    • http://presentinsta.online/974898191087oxp2.pdfIn PDF document text
    • http://prazdnikprosto.ru/black_panther_soundtrack_mp3_downloadisnn8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5fe57345cc078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_6015cbfc53175.pdfIn PDF document text
    • http://presentinsta.online/cara_hitung_uji_reliabilitas_manualjj3cc.pdfIn PDF document text
    • http://pubguckazan.com/how_often_do_you_change_automatic_transmission_oilvgzo3.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/54f0d95e-4065-4fd3-aa32-202c76a043c5/dibekiwewixitawifol.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/some_interesting_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/hollywood_movies_2017_horror.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/20860432376.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/antichrist_2009_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a50c20-0fc2-439e-8202-439a662af1d1/us_stock_market_open_time_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183b66a3-9ccb-4a3f-8e83-176ff93bad8e/legatuwomakirub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0039f29e-edec-4777-b192-cdc2772717ca/76734311314.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/bazukelazoworabujuvul.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/1827221417.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/tavebaz.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/mesufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d95885a-33fc-422e-868d-58710293e6c7/dimugeveviwojed.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_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 5260 bytes
SHA-256: 129b750446cce7df4411eebb5fa0dc58850df19be0106e04a67db396eb364069
font_01_sfnt_off0000fd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 9960 bytes
SHA-256: c982bafedd6a6869b6614287f4ac7d26c669e0bc3171e75644386bb8834d57d5

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