Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6b31c95caf0863…

MALICIOUS

PDF

74.7 KB Created: 2021-03-31 07:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 67647b98f6ff71d152b37c92f7bf2f9e SHA-1: 18f0620cdf441af19fe7797079e22e2fb10eebfd SHA-256: 5e6b31c95caf08632a09239c3f459c351923d9bc24e0bcda1b5dbbd4ae72012c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of malicious URLs and the overall context suggest the document is designed to trick users into visiting a compromised site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=hoover+steamvac+widepath+ls+parts In PDF document text
    • http://matrixbicycles.com/free_pharmacy_pocket_guideejd7r.pdfIn PDF document text
    • http://vekvelo.ru/call_of_duty_update_sizeya8wx.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/nNWYghA/xugugibukuwopim.pdfIn PDF document text
    • http://dle-tpl.site/25968132098yx9kh.pdfIn PDF document text
    • https://cdn.sqhk.co/juzureniwibu/X5y1jfg/vurijizekagezulozovevuv.pdfIn PDF document text
    • http://my-favshop.online/android_auto_review_sync_3dbdpv.pdfIn PDF document text
    • http://55571.ru/the_sacrificial_egg_summaryy3pjx.pdfIn PDF document text
    • http://milanbeachs.space/daniels_hall_uc9n2dt.pdfIn PDF document text
    • http://tizedamini.iblogger.org/webpage_to_chrome_plugin.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/monolithic_dome.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/how_hot_do_big_chief_smokers_get.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/22602721778.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/zozamujuvumujiwiregi.pdfIn PDF document text
    • http://jamenajiko.myartsonline.com/properties_of_periodic_table.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/51335917908.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/ffxv_omega_weapon_guide.pdfIn PDF document text
    • http://pogosib.epizy.com/white_christmas_music.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/electrocardiograma_aha.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/gaxizexipavekoxezefaw.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_off0000e738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 5424 bytes
SHA-256: 4c2a3079101301fb850ea8be1097cbbefbcc8482ab4fbc4ab7fccc4050d7b3db
font_01_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 9904 bytes
SHA-256: 69cd68cfe4388f09fe5f4105a0694fbd43c1742a53a7827511cf2a3647622735

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