Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc27753ca225d14…

MALICIOUS

PDF

81.4 KB Created: 2021-04-09 23:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f56fa60d6c4689e9941cb2cb751af4 SHA-1: 8768b72cb161445e84671d934ea57dc0b83a55fa SHA-256: 9dc27753ca225d141bf9a4920c074fedf5dc7378130b2b9b4e07d939ad24752d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious URL, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Adp biometric time clock instructions'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=adp+biometric+time+clock+instructions
    • http://topmassage.net/jenkins_dotnet_core_deploykfmlf.pdf
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fdcc03f7b4fa.pdf
    • http://prolac.ru/dukilopajatyhuz.pdf
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5fde20b4cd22b.pdf
    • http://naturelofo.mypressonline.com/what_is_reflection_coefficient_in_seismic.pdf
    • https://cdn-cms.f-static.net/uploads/4469863/normal_60198eb259cd9.pdf
    • http://mavogevuz.getenjoyment.net/alleluia_sheet_music.pdf
    • http://nigemutekilum.mypressonline.com/morefape.pdf
    • https://cdn-cms.f-static.net/uploads/4486350/normal_5fda4a4d19068.pdf
    • https://cdn-cms.f-static.net/uploads/4454290/normal_6052d6899e8e6.pdf
    • https://cdn-cms.f-static.net/uploads/4383475/normal_600fb1a31ea7a.pdf
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fd7ceb444ed6.pdf
    • https://cdn-cms.f-static.net/uploads/4383156/normal_600c3efdc329b.pdf
    • http://rolorutebu.sportsontheweb.net/mivuru.pdf
    • http://joritirumag.mypressonline.com/nobufowuwunozesozedalam.pdf
    • http://torixobo.mypressonline.com/jegosiludubasanunix.pdf
    • http://galosidijixiwu.mypressonline.com/xezobufo.pdf
    • http://jiteruruw.sportsontheweb.net/10578970929.pdf
    • https://cdn-cms.f-static.net/uploads/4485695/normal_600ef473b17c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ff4241a3-a80e-49dd-96ba-8f595e9d731b/what_movie_genres_are_there.pdf
    • https://uploads.strikinglycdn.com/files/53335f59-3796-4ffc-ab8c-7e2a254b853b/63480663019.pdf
    • https://uploads.strikinglycdn.com/files/05e0d4f8-02b4-426f-9c8f-b56dd72b3229/73478236660.pdf
    • http://rewuwuja.onlinewebshop.net/xakujise.pdf
    • https://uploads.strikinglycdn.com/files/039245a5-37c9-44cf-9d99-79e2ef7f8625/remington_700_xcr_tactical_223_for_sale.pdf
    • http://kegigija.atwebpages.com/getenabirirukuxe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc5f.bin
fdaafff8a6c9def2aa750c22378556e62fcac19afacd066f4b922c914b2c0301		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5F 5200 bytes
font_01_sfnt_off00010df7.bin
a4455fb640b8cdcd52ef33428bd6e1bcbca295753c3f351d704f4a69a45281b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 11868 bytes

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