Malicious PDF — malware analysis report

Static analysis result for SHA-256 9672d366ed45878c…

MALICIOUS

PDF

44.6 KB Created: 2021-06-11 06:43:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 25ec4f513dbcd5a32dff929850199b74 SHA-1: 19157e9fd963b193de22bc3a3583be72826979fb SHA-256: 9672d366ed45878c4ca3c3da020e90ff64b339546b2c22c4b01a9282660db870
122 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and generators to entice users to click on embedded links. The presence of a 'download button' heuristic and an MFA lure suggests the potential for credential harvesting or the delivery of a second-stage payload. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious workflow, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.tw/app/431946152/cheat-codes-for-bea-simulator-on-roblox-game-hack PDF link annotation
    • http://bit-sky.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/rbl-robux-gives-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-mod-free-download_GM406889139.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_004_off00004e84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E84 25528 bytes
SHA-256: ba8a729ec757708200d6210d0d2f99dbc451ba5a64e057765c7188cd6971c0e0
font_01_sfnt_off00008982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8982 19140 bytes
SHA-256: d2d77b708597723bfd5ed3c33fd8618c22df6f3ac80dab21591f4e460d09c9ed

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