Malicious PDF — malware analysis report

Static analysis result for SHA-256 100d9a2d85bb3cd9…

MALICIOUS

PDF

76.4 KB Created: 2021-03-09 11:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: cb4d105db8b3db386edd95049a57ff44 SHA-1: 4c5a818cf982487696722c80ab353ecf7f0b5817 SHA-256: 100d9a2d85bb3cd9bc1e838a45ed7dc8c6f6baede44c67aa184d40e868754f32
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Dell active stylus'. The presence of an external URI in a PDF is a strong indicator of a phishing or malware delivery attempt, likely via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/strik?utm_term=dell+active+stylus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fc6489914785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_604064f732b18.pdfIn PDF document text
    • http://znalomstvavip.site/patron_mutlu_son_istiyor_full_izle_tek_para_hdokh5f.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/vusejem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_601e5ef02e99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_60144d173c9e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452835/normal_5ffde45611991.pdfIn PDF document text
    • http://nat-fru.space/95574591082x2h3n.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/alpha_word_in_urdu_alphabet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485823/normal_5fcfa84151069.pdfIn PDF document text
    • http://amandeepsadyora.com/novopibisodinqxjv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459469/normal_5fce89c89db76.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/the_reluctant_fundamentalist_summary_chapter_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_603bc1de07dcc.pdfIn PDF document text
    • http://thesimplycompleteseries.com/glenwood_oregon_weather_report7itcy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fdb578e34bb1.pdfIn PDF document text
    • http://dvigatel.guru/799861808929p2lv.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/delonghi_pinguino_portable_air_conditioner.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/vavale/flow_meter_sensor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/dewalt_3800_psi_pressure_washer_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/why_should_i_recycle_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/vemilagubusekebiso.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/inbound_marketing_certification_answers.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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 4524 bytes
SHA-256: c8b508d96fa38b95a274d4224f29e1649389a129a55198122b37ca98c13ff882
font_01_sfnt_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 12504 bytes
SHA-256: 9ef26410ee0bd585cd9ef34e7dbbc4a3d5b44db1abf7b692f46195079faa5cee
font_02_sfnt_off00011676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11676 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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