Malicious PDF — malware analysis report

Static analysis result for SHA-256 9129df5b104e6d94…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 16:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ab75713bdc7f6fa7ed47fe7e37b93bbe SHA-1: d1b4ad0471319c7f45c062536dcd48345dea2470 SHA-256: 9129df5b104e6d94b6bac1d84893aef69c5bcb4e6b6b595651d6aacd4262efe9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/406889139/spin-and-coin-link-game-hack'. This lure is designed to trick users into downloading potentially harmful files related to game hacks or generators. The presence of numerous similar URLs suggests a campaign distributing malware disguised as cheats or free items.

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/406889139/spin-and-coin-link-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-got-talent-piano-hack-download_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/ahk-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-without-downloading-stuff_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/earnrobux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-tiktok-followers-real_GM835599320.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/wurst-112_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/discord-free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-and-tix-place_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_off000035e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E3 23144 bytes
SHA-256: f8f7e2ac397eb16af40aaaff48f9b79d0110f791075fbd034a8daa4292cdcc80
font_01_sfnt_off000069ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 18252 bytes
SHA-256: 28736b5a9916539d9e1831f3abe62990d836adc850f66a331ce26b94ec86a8df

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