Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19b7d90d00981ae…

MALICIOUS

PDF

46.6 KB Created: 2021-05-16 04:17:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8a083d8b12703096ea6a2a6b2f56aae SHA-1: 77f2f74a3b29e4b9f54fc2f90b7dd0cfd91ae6b1 SHA-256: b19b7d90d00981aed7b8dce369da3d30a59ef277379d27b69b64748a94680d84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to trick users into downloading potentially unwanted or malicious software, masquerading as cheats or free items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/krnl-roblox-game-hack In PDF document text
    • http://elektrofahrspass.de/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://elektrofahrspass.de/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://elektrofahrspass.de/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/robux-prices_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://elektrofahrspass.de/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elektrofahrspass.de/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EA 28364 bytes
SHA-256: 934b95e424d8ca6214b174115722636b50a2d91be4c687bbf132bbe1f4a6a396
font_01_sfnt_off0000880e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000951f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951F 17784 bytes
SHA-256: 7fc5638c4d6a7adf3a00de91436b89ff4a884cee4fe7182ef9800dc1feaad259

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