Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c59224c485a91c…

MALICIOUS

PDF

76.7 KB Created: 2021-04-24 03:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7455acc2a64a79cbb9f64162290ad3d3 SHA-1: 4c481223557908b8758dcadf1c25f3255652b4a6 SHA-256: 46c59224c485a91c50e7b92217d868f61a10811ab9f876b5bfeff939aeca1e70
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain metadata related to network hardware, suggesting a lure for technical users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=rt-n66u+manual+reboot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384167/normal_603ccc004de83.pdfIn PDF document text
    • https://pukibasobudez.weebly.com/uploads/1/3/1/3/131379944/rogobodexejukel-tezuwoteje-jivuvikowelidit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_60123e1823550.pdfIn PDF document text
    • https://cdn.sqhk.co/tisojubew/sigSKii/mevamexitezibewogaboje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fce6a77256f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_60102a94bc4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497395/normal_60086ad48838c.pdfIn PDF document text
    • https://cdn.sqhk.co/nawovoso/khcoIge/the_maxx_tv_show_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/ie9Zdgd/samsung_email_app_imap_settings.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489850/normal_60076bb58407a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fd82c719710f.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/iahjgiT/zikesabirosiredelage.pdfIn PDF document text
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/xosulenapofasenofis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5ff8b1bf48a5c.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/da96acf5-a9c7-4c79-b21f-5173d3a4e81a/besikudeferanikefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba067a7-aad3-4d8f-bc41-0d10880a3fa2/bizudiromogikobedivili.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/how_to_clean_mosquito_zapper.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/lomexanuwij.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/envision_math_grade_2_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/kutuzivalimorupafut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecaecb7f-d534-4234-904c-b809d13f3e0b/marketing_digital_que_es_y_cmo_funciona.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_off0000ef12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF12 4984 bytes
SHA-256: 16dfb546b5f468f34217ce748204c5a7c3269bd1906b4d965f86288f752fdc1f
font_01_sfnt_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 10952 bytes
SHA-256: 5543d22fa1f511d75960ab53e2c0522d9095e27f673b59474665f38d238c12ff

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