Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecbc118e32be06a…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 13:48:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0eca85bddb7959791894fd022998110b SHA-1: fe7e79fe129b4dee4a22f7a2358639487bf31302 SHA-256: 9ecbc118e32be06aac0af19188c4e2d5f03025d94b9821cea6bb60a211a5e8f6
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (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 0.9971

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.
  • 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
  • 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/hacks-minecraft-game-hack PDF link annotation
    • http://fiur-malermeister.de/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-coins_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/robux-rewards_GM431946152.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://fiur-malermeister.de/images/pokemon-go-free-wallhack_GM1094591345.pdfIn PDF document text
    • http://fiur-malermeister.de/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B52 25512 bytes
SHA-256: c7c6f5a4304708e910bbf1092159fe28d586429a8ab91bd4bd3fe44020ab410f
font_01_sfnt_off00008583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8583 17740 bytes
SHA-256: b4d4c972e4571c6533ebd60601472515a9d19d13ad1d189b55006888a0b23e02

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