Malicious PDF — malware analysis report

Static analysis result for SHA-256 582fab7f6b69b908…

MALICIOUS

PDF

73.6 KB Created: 2021-04-02 03:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d206646e851da89a3bcbf0efac8ad0c SHA-1: 10e9759f5e7af0d9271c90092bf913bfbf863ef6 SHA-256: 582fab7f6b69b908971bbfae86d55b3ae035053ecd528014a002f43763d4010e
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, one of which is `https://ponafet.ru/strik?utm_term=autocad+civil+3d+tutorials+for+beginners+pdf`, suggesting a lure to download further content. The presence of PDF-specific heuristics and embedded URLs points towards a phishing or malware distribution campaign.

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://ponafet.ru/strik?utm_term=autocad+civil+3d+tutorials+for+beginners+pdf
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/gexozupe.pdf
    • https://cdn-cms.f-static.net/uploads/4469126/normal_6044674a1691e.pdf
    • https://cdn-cms.f-static.net/uploads/4367648/normal_600a5742c60e4.pdf
    • https://cdn-cms.f-static.net/uploads/4491437/normal_6056ddb4c4514.pdf
    • http://optarfes.com/ferirevaderamuwodo9932o.pdf
    • http://wusumomijo.medianewsonline.com/decimals_worksheets_grade_6.pdf
    • http://pubgucbayim.com/ellen_hopkins_audiobook_freehgxkd.pdf
    • http://panixatexoxureb.22web.org/libro_bestiario_tropical.pdf
    • https://cdn.sqhk.co/fematixub/dsihhin/59799212822.pdf
    • http://form-copyrightservices.com/affirmed_meaning_synonymnbwxb.pdf
    • https://cdn.sqhk.co/puwonereb/XXJYjhm/45587723274.pdf
    • http://zelumefepa.sportsontheweb.net/943418575.pdf
    • http://doniposebuk.iblogger.org/2812531592.pdf
    • http://wikowezenitezo.medianewsonline.com/basic_life_support_free_download.pdf
    • http://genemot.22web.org/khiladi_bengali_movie_video_song.pdf
    • https://cdn.sqhk.co/nonagidux/wjehfE1/server_jobs_los_angeles.pdf
    • http://help-feedback-amzn3.xyz/greatest_hits_of_the_90s_youtubelfz30.pdf
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/sorid.pdf
    • https://cdn.sqhk.co/sepetuvab/hhbheia/68921853619.pdf
    • https://cdn-cms.f-static.net/uploads/4371808/normal_6026409b53296.pdf
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/wisenukagujuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gavawekib.myartsonline.com/95554459702.pdf
    • http://relixaweb.rf.gd/pdf_page_splitter_ubuntu.pdf
    • http://vetetipusel.rf.gd/parrot_voice_recorder_mod_apk.pdf
    • http://gakamaxoluzes.atwebpages.com/nofob.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_off0000e143.bin
2024562794d95c92e8b3455f6a791646d910a9c5f65d1273211a87da7ef435d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 5676 bytes
font_01_sfnt_off0000f4ad.bin
dfb7595a4636d5a653e424866c5e2f78c449f00b9b0ad96835960990e3af6cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 10512 bytes

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