Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d752e63b822e60…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 20:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: eb52c5acc884f4c711b307555f832dea SHA-1: 9c520454f65f82a4c667adfaa330defdd38145eb SHA-256: e1d752e63b822e60d4253c8af7469657eef9ea6a4934b5894bf595b0ab6c09a7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and accounts to entice users. It contains numerous links to redirector infrastructure and link farms, including http://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack, which is flagged as malicious. The document's structure and embedded links suggest a phishing or scam campaign designed to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-prizes-roblox-2021-november_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-robux-hack-apk-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-apocalypse-rising-cheats-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/robux-hack-2021-no-survey-or-human-verification-no-downloads_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-hack-roblox-murder-15_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-spins-coin-master-app-ios_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
font_00_sfnt_off0000307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307D 21908 bytes
SHA-256: a5e6e408d7cfe0fe971e089cc92ac323d65268fea60f02688a91b485c8f152cf
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 20124 bytes
SHA-256: e8dc8af608a2467c92ba912a1f660b74916591188ffd601a7d8b89018af53e3a

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