Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8263c31bdea717e…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 04:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19d98a8f07bca8b2ba503db19236452e SHA-1: 663e0650abd430a3fca517e882550e71389e99ac SHA-256: d8263c31bdea717ebb2d1bebacbe0bb2b2ff266ca0b66555da3831eea034db12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a primary link identified as a malicious redirector. The document body and heuristic firings indicate a lure for 'free Robux' or 'game hacks', a common social engineering tactic. The embedded URLs likely lead to phishing pages or malware distribution sites, aiming to trick users into providing personal information or downloading malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-robux-without-verifying-2021-game-hack In PDF document text
    • http://seniorenverband-brh-nds.de/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coinmaster-rewards_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
stream_003_off000048c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C4 25388 bytes
SHA-256: 9eeb4952d1648915487c7378d4d1db5b1e0dfb4b5a3c1a2d7b4a8fb3fc97f421
font_01_sfnt_off000083cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CC 19772 bytes
SHA-256: 854662d4ed02eaea1b0a0020fc7ac25fa5b331288bf96b43491be4028b138ed1

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