Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b40cf6fead9b7cd…

MALICIOUS

PDF

81.0 KB Created: 2021-04-13 10:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8f4a844a1667c14391bb157a1b1c2d36 SHA-1: 82267a622b9031f07124130ba23871208e587510 SHA-256: 7b40cf6fead9b7cdccb5aad884051b913f8d833416c1c4a311a7fc01cf78a97b
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 0.9998

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://botokaw.ru/strik?utm_term=why+is+my+hp+photosmart+5510+not+printing+black PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445736/normal_5fd30a9ae0edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_602385bf997ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5fea248721505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5fee47c732733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fe8ebace8f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fe168fe669f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462976/normal_5ff491d0087b6.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/83826091573xod66.pdfIn PDF document text
    • http://kleomaften.online/fekumuluac6q9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_60531480b7362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_6016c9b870939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371266/normal_5ffb33d481df3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a369a0d8-9696-4002-8265-3c0346482ee5/how_to_use_samsung_xpress_m2835dw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa97894-8155-4347-8df1-2e57d58e436e/hr_recruiter_job_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/why_is_my_washing_machine_not_getting_hot_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3031b84b-23a3-4dfc-928c-4b0ea483af53/72154474352.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/pekipigonimamonitenebapif.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/berlingske_serif_free.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_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 5984 bytes
SHA-256: 8062c3dc4a4580e5f7e197dc1b547034f51c30ac96e0eda9b1c5e2d2032dcd16
font_01_sfnt_off00011227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11227 10804 bytes
SHA-256: 54a6c3af3969fe9db7ee50b521abf427717ecae1891a901967d6994fe76926b1

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