Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f55f973594aea19…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 08:57:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 074af6a35f5f21b108bc58c85fd73dae SHA-1: b5c1b02323b6f2a32c9daf12e96dec109335a84d SHA-256: 6f55f973594aea1929aafdf026e2c6b49da2afc4562912dd9e897170e8d98bab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as 'game hacks' and 'free Robux generators'. The primary lure is the URL http://netcdn.tw/app/431946152/how-to-earn-robux-for-free-2021-game-hack, which is designed to trick users into downloading potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution 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/how-to-earn-robux-for-free-2021-game-hack In PDF document text
    • http://katalog.perpustakaanlia.net/repository/how-to-get-free-stuffs-on-computers-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/roblox-prsion-life-hacks_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/free-accounts-for-roblox-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/roblox-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/jailbreak-roblox-hack-money-2021_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/do-surveys-for-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/how-to-gte-robux-hack_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/free-robux-no-verification-android_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/cheat-engine-roblox-fr_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/how-how-to-cheat-on-roblox-pc_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/turtle-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/how-to-hack-roblox-pokemon-universe_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/roblox-characters-with-free-items_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/hack-de-roblox-poder-volar_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/proto-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.perpustakaanlia.net/repository/free-robux-apk-extension_GM431946152.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_off00003158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3158 22332 bytes
SHA-256: 84c17880f653be37d7e163a5eef50de30da6d123a257824ff9fac86086e30593
font_01_sfnt_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 19284 bytes
SHA-256: b399ae733d7917559aeb38653f56690fc8d0842846df9d5376906f0eed96920f

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