Malicious PDF — malware analysis report

Static analysis result for SHA-256 0223cd41c9bc770a…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 20:54:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d8244ea223adc91cb2e015335501c9f4 SHA-1: c8263e8b55c74019916f5b05d5bd11116177ef3e SHA-256: 0223cd41c9bc770a55066a1f1b449791354925157227562eda147d1f78b9bc17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary link, http://netcdn.tw/app/431946152/free-robux-no-verification-2021-ios-game-hack, is flagged as malicious. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.tw/app/431946152/free-robux-no-verification-2021-ios-game-hack In PDF document text
    • https://mbbs.hr/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-boxing-simulator-2-hack-strength-script_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-admin-panel-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-free-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/my-roblox-account-was-hacked-and-email-changed_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-bedrock-free-download-pc_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
font_00_sfnt_off000032ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AD 22384 bytes
SHA-256: e0ea5089b5d71c041d3060f3651dc14d794024e54d0ae053c45bb19c9241438d
font_01_sfnt_off0000647d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 19476 bytes
SHA-256: 9fe1ea1c86177197d61ed707d4c4071d93c63f21ffdcda5dbf12cc87dcc1e4af

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