Malicious PDF — malware analysis report

Static analysis result for SHA-256 213d375020d833d4…

MALICIOUS

PDF

80.9 KB Created: 2021-04-01 00:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 176aed8ace0e1daa04156580ac668d65 SHA-1: 2bb8c7520ae1d383d955342701921aa2098e0213 SHA-256: 213d375020d833d4b23bf4bb74994768a63e6ddd3d819ddbc0497aa85140ceda
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing lures. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting an attempt to drive traffic or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=recoleccion+de+datos+estadisticos+matematica PDF link annotation
    • http://giveaway2020.info/fikubikipilijowigine5wia7.pdfIn PDF document text
    • http://makamar.xyz/tegisunudovekiletumev9cpaa.pdfIn PDF document text
    • http://polfact.site/rizakovogovokuwenujolexogjyg39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_6062ae18cca16.pdfIn PDF document text
    • http://faceit.su/93369675575x2xp0.pdfIn PDF document text
    • http://juilopkiretlo.ru/what_is_restricted_cubic_splinejheep.pdfIn PDF document text
    • http://auto-fishing-rods1.club/costco_food_court_nutrition_chart4qk7g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5fd27e6db4e84.pdfIn PDF document text
    • http://women-ita.space/linux_kernel_driver_development_bookmg13s.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://s3.amazonaws.com/jukezeluf/shutter_horror_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/bulbul_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/xixebinisapitepoze.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/51828853341.pdfIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_d695e59fc37e4c6783ee287b69fc4112.pdf?index=trueIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_bd6c96464b8e4709acc0bee5629d14f9.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_defff3ff73d04b4ab582580945778e40.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_dc59e3da1d424fd787d65ac6d8611c20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/income_statement_and_balance_sheet.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_cbe7881696144dad91574ecd672c09f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/futamo/megixuli.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/standard_block_letter_format_example.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_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 4784 bytes
SHA-256: 7cf86657e53e6ba099a334a4bb010aab604dadc5fdc0afeae72adede8327a7ea
font_01_sfnt_off0000fd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 13076 bytes
SHA-256: 1347ae0fda8c241e8ab34d866396177b108818be4a1137bc996d721f88f55f8d
font_02_sfnt_off00012618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12618 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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