Malicious PDF — malware analysis report

Static analysis result for SHA-256 b118b4e8b108d562…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 06:50:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9b871553bd1c7af26c0f2628112780f3 SHA-1: 84ad68d0de06396cc13a1866d110aa4034702e5b SHA-256: b118b4e8b108d56299a7a26e8c0fb005f2eea1b6bbfe7eab2eb7c4ab142ac2b6
200 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and cheats. The heuristic firings indicate that these links are known malicious redirectors and are part of a lure for free generators or game hacks. The document body also contains similar lure text and URLs, reinforcing the phishing nature of the document.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/coin-master-spin-pattern-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-infinite-money-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/2021-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-any-free-robux-item_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-roblox-pc-speed-run-4_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-clone-tycoon-2-codes-hack-get-1-billion-gems_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-free-robux-scam-discord_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-admin-roblox-how-to-get_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/download-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-federa-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/impact-minecraft-hack_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_002_off000032bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BD 22792 bytes
SHA-256: 6af4e52388c34de3c994cd6a8b95c6a1323b2a1539880ec89466eb2de5e667df
font_01_sfnt_off000065dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DD 18164 bytes
SHA-256: ed9f68ec026ca129e8783fc574a301f430716ad3a17cd6e44bedaafa890ccd76

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