Malicious PDF — malware analysis report

Static analysis result for SHA-256 899ed7945ffd741c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-01 02:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f165b24b7724bc9c13972a9115234db8 SHA-1: 0a4998fe22f32e10d323e6a24bee982c097d4ad9 SHA-256: 899ed7945ffd741c41171d72821bc7fd97123eabf1d1bf636960d1a54fbd793a
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, likely intended to host phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to the URL's keyword, suggesting a lure for educational search queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=monitoring+progress+and+modeling+with+mathematics+algebra+2+answers PDF link annotation
    • https://cdn.sqhk.co/vupapevixu/eMTiajf/art_deco_sculptures_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/ehBib73/download_game_survive_wilderness_survival_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6017a7db0cfca.pdfIn PDF document text
    • https://cdn.sqhk.co/masezupusi/HlijUhi/kpop_free_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_60238ce4f31ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_5ff70c0b4a8c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5fcecc2c4482c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_603a8324313c5.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/fWBjaVm/gagekalago.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/diijj17/8330060200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_6019248d7abaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_5fec9fdeb6ded.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipudovisubu.rf.gd/banda_calypso_cd_roubado.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/what_happens_if_you_drink_water_from_the_dead_sea.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/battleship_game_free_for_windows_8.pdfIn PDF document text
    • http://sibovup.epizy.com/rifabinikotenem.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/begerugisodobereb.pdfIn PDF document text
    • http://ladorum.epizy.com/afterlife_game_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/windows_10_pro_1903_microsoft.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_off0000f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 5856 bytes
SHA-256: 4a122d730a2be1f3122b9b5fe46db1b188ec6c8115bc89a6a0ae8bc23aa8e94a
font_01_sfnt_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 10440 bytes
SHA-256: 63a5f8334b38fdcaef48b5c3d53b356314da3b9a8bc0b3a5ebed98bb8d51181b

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