Malicious PDF — malware analysis report

Static analysis result for SHA-256 e622a7e40fdf6d58…

MALICIOUS

PDF

73.8 KB Created: 2021-02-26 04:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9fc338bd68f9025c245f0c2af8298163 SHA-1: 7162bf45f58c5c2bed4fa71e83fb939b3c4cefe7 SHA-256: e622a7e40fdf6d589ead45d5b1c07764dc235c471cd5c819a59d5784497cc66e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by ClamAV and ML classifiers. The document body, though partially corrupted, suggests a technical support lure related to a computer issue. The presence of an external URI points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://leonvi.ru/award?keyword=computer+won%2527t+turn+on+but+power+button+lights+up PDF link annotation
    • http://lnstagramverifiedbadge-media.com/legal_letter_of_advice_template_uk0ucyy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5ff30270ae78c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fddd9281e23d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5fffa71760988.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/jeGdjdU/latest_samsung_galaxy_s9_ringtone_length.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_601f5b8b3113b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_6029793cc9ce5.pdfIn PDF document text
    • http://podipotekoi.ru/bee_movie_apk_freea28ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_60258a6414820.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/Qhcha1n/luvuluxoruzalanamupikeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480732/normal_6031dbc4284fa.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/fjaheSv/1st_grade_spelling_activities_printables.pdfIn PDF document text
    • https://cdn.sqhk.co/mobobelelu/giejdhc/centris_federal_credit_union_north_platte.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375350/normal_5fffb3500ff92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_600ce98859f1a.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/dowavelaxam/33802642878.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_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 5192 bytes
SHA-256: fb19c1fed32eb4a51a49667ad50326a4e77438f70283f5b95f0167269634b9e5
font_01_sfnt_off0000f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 10184 bytes
SHA-256: 4877ffa49294467c99834b9b888a59e61be6ecbcbb2afcb2ff45f3180764183f

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