Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f648fe2aec7191c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-18 04:47:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5ee3a0c34035ecbe1d8227f521a2209a SHA-1: c9f4b50b3e0c70d10f84c75d09124952998a8cc8 SHA-256: 9f648fe2aec7191c1a5e5d92f2f3a94c340667713276ece06fe0834802be7a9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free Robux" and "game hacks" to lure victims. The document body and embedded URLs reinforce this lure, directing users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-with-no-human-verification-game-hack In PDF document text
    • http://lamascheradiferro.dk/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-coins_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/best-free-hacked-client_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_003_off000046c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C4 24964 bytes
SHA-256: b8c24e39385eeb7db6026deeac2923d8bd7701a756e25e0d807d695ad20f48a6
font_01_sfnt_off00007fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB3 19224 bytes
SHA-256: fee2af4c7f09d7ea12136e2767a6473cb73ac52634d47b0a6a367e18f3240d40

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