Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf19660f39e414a…

MALICIOUS

PDF

40.4 KB Created: 2021-05-20 13:01:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bb546ad6fb33e11b9b7cb23d8f40bb60 SHA-1: 69a2c59b2efde8e821ae222a1274544872987792 SHA-256: 8bf19660f39e414acca5240f150309e6c8d579cd9ca37a6d2f951c2b508b73b6
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7768

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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://netcdn.xyz/app/479516143/free-minecraft-java-edition-account-game-hack PDF link annotation
    • https://www.maximabm.com/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003720.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3720 25992 bytes
SHA-256: c5fc0c6696259865fbadedbdbdd4c003b6ecbd87ac15a92fb40793264e9efa89
font_01_sfnt_off000072c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C61 18304 bytes
SHA-256: fdb32e200e3f48b15bca95ad0d9adda07d4e6a4b6e210c555ad24f5d4abffe5e

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