Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9f260f3b390d4b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 01:58:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9e005d1868c092ab4490be132da1c210 SHA-1: 104ea33229ef2866b8e9fb23c4fc12c232da1692 SHA-256: 1e9f260f3b390d4ba4a8d071b6001c568248e12bd6e773a8bcd8e9051a8fd672
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that claim to offer free in-game currency (Robux, Coin Master spins), a common lure for phishing or malware distribution. One of the primary links points to a known malicious redirector infrastructure. The document body and heuristics confirm the presence of these lures and the use of IP addresses in URLs, indicating a high likelihood of a scam or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-robux-websites-that-actually-work-2021-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-purple-items-on-billionaire-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-items-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-free-hoodie-template_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-through-coin-pop_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
font_00_sfnt_off00002f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F44 21936 bytes
SHA-256: bb954a12b201b01bf39c6687254aafdad1ee2ecbc12e00aac7fc6a8d28fca30f
font_01_sfnt_off00005fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 20132 bytes
SHA-256: 9d543b218f76da85b115eec436649c45a36d61030086af4e0a98f96e7e9ce1eb

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