Malicious PDF — malware analysis report

Static analysis result for SHA-256 9908f1f20bded301…

MALICIOUS

PDF

82.4 KB Created: 2021-04-07 05:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 792aeba8524e07acb57a45ecfdc92a5c SHA-1: 4089fcf5f3dd7bf1d2c1a1849ac5729a40bcd1bb SHA-256: 9908f1f20bded30133b44b39bdcb9043658ade86634a965a857b9e86697e4479
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous external URIs, many hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on low-reputation domains. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=business+success+definition+pdf PDF link annotation
    • http://sadinexiwa.mygamesonline.org/90366373003.pdfIn PDF document text
    • http://choosemadam.site/tiwokobokokari1g1e4.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/9b912923.pdfIn PDF document text
    • http://biomaniks.website/52354435353goe3u.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/classification_of_animal_kingdom_class_9.pdfIn PDF document text
    • https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/8828233.pdfIn PDF document text
    • https://dupevolorimix.weebly.com/uploads/1/3/4/5/134588768/newike_tafowi_fojurigo_vojatibimu.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/is_samsung_washer_and_dryer_a_good_brandg7ufr.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/pirates_of_the_caribbean_theme_song_piano.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/7508655.pdfIn PDF document text
    • http://all-host.site/nidewinofabesalelati51dbk.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/eae1610338a9a.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/8a80e61b6.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/vojapu/pebononepakelakudebib.pdfIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_3eb2c19d4ba44e4fa513fd3061fed3a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/kixurisezuworabejazupof.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_52aa131afc4444eeb9589fa7d591d5ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/49890007212.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/jacoco_report_zero_coverage.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_dd66bd349d20424491906b4bbc0df120.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiniruru/jetoleveguz.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_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 4744 bytes
SHA-256: 6cba11532e85f95099398ad8bc0af20cade4ac502224e680bfa6c32fd02a30d0
font_01_sfnt_off00010718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 12112 bytes
SHA-256: d2972fd35666638ed4b417fdd06353bae87888585a20f9b48655f8b0e597346b
font_02_sfnt_off00012e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E59 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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