Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d705e99149e3943…

MALICIOUS

PDF

136.9 KB Created: 2021-02-12 15:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c8ea0230eda05def7e84c9ec8cf90069 SHA-1: 61fcbf9ebdd066e99feb511672ecdd5cdc80e909 SHA-256: 5d705e99149e3943a215d9d5d2a15d88e2c5993fd25956a2336fb6eed9c89ddb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan-d2568dad23a94d95'. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=star+wars+a%2527sharad+hett PDF link annotation
    • https://cdn.sqhk.co/mezutorixo/hjivmhg/c64._emu_1._5._45_apk.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/288085.pdfIn PDF document text
    • http://bcipreactivaperu.com/8894536683t3e9m.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/fGHhdgh/47617485249.pdfIn PDF document text
    • http://spiritstudio.ru/muskurane_mp3_song_free_downloadpbmms.pdfIn PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/pelijofetejiso.pdfIn PDF document text
    • https://japugaze.weebly.com/uploads/1/3/5/2/135295186/cd8f7f.pdfIn PDF document text
    • http://blancer.xyz/8799917957usxll.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/lumomavokezazut.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/e4ahe47/tubbo_minecraft_face_reveal.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/gupawupigawono/alphabet_worksheets_for_kindergarteners.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/finding_slope_of_the_line_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/xukarexiponanujorumapo.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/free_marriage_counseling_certificate_of_completion_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/how_to_write_coronary_angiography_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/ms_access_vba_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/basilica_di_san_marco_venezia.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/powerpoint_design_templates_edit.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/business_corporations_act_ontario_forms.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_off0001dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFC5 5108 bytes
SHA-256: 95021fa3648f5c32f5aebc38fb661edf5274f4da8a071f04643b1cb512607eb8
font_01_sfnt_off0001f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F134 10776 bytes
SHA-256: cd8f03d01a21f49ff54f5ca585be69ce1dc993094d6d83d7622a2a16bb11d0e1

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