Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf8d576b4602fa4…

MALICIOUS

PDF

77.3 KB Created: 2020-11-24 18:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 67f2e7c575fdc6bcf82c2057130e195e SHA-1: 268538d645f4a844f0537af9648cece9841fdfa1 SHA-256: cbf8d576b4602fa48f6da7873f6e8e9af62bb5ae05720b65e80e88c73d2acba8
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a phishing lure and attempts social engineering by instructing the user to execute commands via the clipboard, consistent with ClickFix attacks. The embedded URL points to a suspicious domain, likely serving a malicious payload. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/strik?utm_term=airport+tycoon+3+ogg.dll+error PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f9722372e52a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8db787be5f7.pdfIn PDF document text
    • https://pojojupekofep.weebly.com/uploads/1/3/4/7/134754506/7741111b7f.pdfIn PDF document text
    • https://ponusowugam.weebly.com/uploads/1/3/4/4/134438000/tikidirekozixewageke.pdfIn PDF document text
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/ccf6b75ca.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/vukokaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487632/normal_5fa917286c52a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_5fad9e1ca8b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_5fb3fdb9c14a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gotijejaj/ranajisuguvexe.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/spectrum_math_workbook_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/sahuaro_high_school_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/west_point_bridge_designer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 4928 bytes
SHA-256: 2c42b903b5d8b4d4086fb7217728c39edd1157aece3787dbf67eebefea002f40
font_01_sfnt_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 10880 bytes
SHA-256: e99f30c53946efd321b2cadd6c47d317b9cf002cf6802995db9bbc046b6ea015
font_02_sfnt_off00011a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.