Malicious PDF — malware analysis report

Static analysis result for SHA-256 414cb467d280ff20…

MALICIOUS

PDF

32.5 KB Created: 2021-07-03 12:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 344395a0f9aa2bd73cba8809c28dc49f SHA-1: 85b445c6538e9bc1b118df334574ef8d1af1bb41 SHA-256: 414cb467d280ff20f19784356b2ccb1c46383c94c7b41b8d113642052cdd18ff
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to what appears to be a link farm designed to lure users with promises of free game items and hacks. The primary link directs to a known malicious redirector, suggesting the document's purpose is to lead users to potentially harmful content or further malware. No scripts were extracted, but the document structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/406889139/master-coin-free-spin-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-any-item-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-dungeon-quest-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-youtube-stream_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-adidas_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-speedhack-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-jailbreak-money-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/cluster-sphere-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-ants-roblox-acount_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-robux-codes-2021-december_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coin-master-links-app_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_off00002aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AED 22448 bytes
SHA-256: 8ec4b5a17c37e1f0afe1d7f585354f61d0b4248ebaf7d1632a8a443400bbf02d
font_01_sfnt_off00005d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D06 18176 bytes
SHA-256: e7ebdb51c22119da7989f291c4e1e79e43f48b2212e10ddb7071af0af135db83

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