Malicious PDF — malware analysis report

Static analysis result for SHA-256 92cdfcfcf3dce326…

MALICIOUS

PDF

78.9 KB Created: 2021-03-01 01:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a5bc7b63c8a769df901153301c441c10 SHA-1: df1c6e361d680ba782104f795bf1399f50ce5549 SHA-256: 92cdfcfcf3dce326defd239e45a9a3320a25da128d09f17a7a350a55a7e76eb6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=pdesas+math+standards PDF link annotation
    • https://vigagexagadip.weebly.com/uploads/1/3/1/8/131856194/3696719.pdfIn PDF document text
    • https://sanituwinera.weebly.com/uploads/1/3/1/3/131379206/9086d27ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404529/normal_600976bc2e028.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/51097137998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_5fee0fc21233d.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/assamese_video_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413702/normal_6023e68b0545e.pdfIn PDF document text
    • https://xefakebeka.weebly.com/uploads/1/3/5/9/135993821/2e61b362bf8.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/xarekiraxozado_nofotu_pijadon_zobumed.pdfIn PDF document text
    • http://wilozobugo.iblogger.org/92502486378.pdfIn PDF document text
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/potolagusus.pdfIn PDF document text
    • https://nexevakef.weebly.com/uploads/1/3/5/3/135327015/3832593.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/aee12200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_602b8c0062947.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/58766569042.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/wazagidonux/akshay_kumar_film_kesari.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/dyson_dc35_battery_removal.pdfIn PDF document text
    • http://fufagagebo.epizy.com/fotophire_photo_eraser_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/bad_company_bad_company_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/boundary_conditions_for_electric_field.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/hillsborough_stadium_disaster_report.pdfIn PDF document text
    • http://nojodesara.epizy.com/greeting_card_template_printable.pdfIn PDF document text
    • http://mefufoseza.rf.gd/intercessory_prayer_requests_catholic.pdfIn PDF document text
    • http://vedisupekak.epizy.com/house_rental_agreement_template_washington_state.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_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 5036 bytes
SHA-256: 75163a118d6478266c7a4c2309013b498d6636c377af24aa90e9900e29988123
font_01_sfnt_off00010b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B11 10356 bytes
SHA-256: b818de94a231e8e4ce198a6c21cc24953893fc6fa5f10ba8b9991cf77899351d

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