Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5950a1acd232058…

MALICIOUS

PDF

79.7 KB Created: 2021-03-24 07:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 742e724c502c56a99109eaa7740f03fd SHA-1: 5959d717f55bff97d0ec77bf9e035df21787c164 SHA-256: b5950a1acd2320580452b42f30d2a81c3d328cbd4cb7d9899678bff8766ee15e
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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure and a security-bypass lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=premiere+pro+keeps+freezing+my+computer PDF link annotation
    • https://cdn.sqhk.co/wezopexa/dNhgfig/prestonplayz_among_us.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_5fe91eb9bd930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450628/normal_5fdc195fc1f70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_604060d54cfa4.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/vjiigcS/chess_openings_pro_apk.pdfIn PDF document text
    • https://mefupawex.weebly.com/uploads/1/3/4/3/134317460/ruwekidezoz.pdfIn PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/xinudagu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473403/normal_5fcb690280bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_60359e8db9a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_605aa6801444d.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/xarojapi/76350063643.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/46001127906.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/does_xfinity_have_home_security.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/chunari_chunari_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/storyboard_template_6_boxes.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/99920524693.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/vurumosiwekutex.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_off0000faa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 5312 bytes
SHA-256: b02cb1b9bf83565d0c6459f9e5984d4c49ccd6b5c44519fd14c9bc24e55e05b0
font_01_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 10320 bytes
SHA-256: c12fea2bddb9e6956543610b9b7ad70aebb6040f6ba39b7e982f2ce49547b524

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