Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c94dc512c86701…

MALICIOUS

PDF

71.7 KB Created: 2021-02-17 01:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 30c629a5f9a15cbff8df31cedccf41be SHA-1: 63bc89788ea36061d31bc9ecffd827e54bbfc0c8 SHA-256: 36c94dc512c867015b73ed3e7a8e031adc5be0a21b3a6a5e16435ec4d9010128
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript T1553.005 Security Software Tampering

The file is a PDF that uses social engineering tactics, specifically the 'ClickFix' pattern, to trick users into disabling security software and executing a command. The embedded URL points to a suspicious domain, suggesting a phishing or malware delivery attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://jottigo.ru/strik?utm_term=logitech+mk710+not+connecting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420476/normal_6016cae463d91.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/s9gfhbk/7192939589.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/egLr0eO/fejiwelov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fc602285e069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fd36ac0d3e17.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/yEliajL/vemofidozomowolabusi.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/oJSNiis/fijisabetategoxupunazaze.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/cbsjdgi/mekifafefidez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453537/normal_5ffbd46648b8b.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/dOhajda/tobofepenorizegoguri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_60098c981591e.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/RjcuieM/how_to_change_screen_time_limit_on_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_600f4bf577e95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505820/normal_5ff5e2568e742.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/sixenogafopoj/33098335303.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/87751146503.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_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 4976 bytes
SHA-256: 2a33c5fa74a7462ea60a4a18806d4e6866f4bf5e218d303219682b206be7b2b2
font_01_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 10312 bytes
SHA-256: fdb3751a8ec9c46eb4b0f57c9fb8a36a542e92acb047c70becd142fe870c7488

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