Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f9104d51ba554d…

MALICIOUS

PDF

47.6 KB Created: 2021-06-11 06:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 01f08e65404d782607537bab5a010f24 SHA-1: c8df113c19f547e495cae0344ba8be1f9077071b SHA-256: 18f9104d51ba554df756185eef43a27528fa08d1b796976aaf267f57791dc7b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'free generator' or 'game hack' lures for virtual currency. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a visual call-to-action button reinforces the deceptive nature of the document. The primary attack pattern involves luring users to malicious websites via deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/how-to-get-free-pints-on-earn-robux-gg-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/pokemon-go-free-coins-no-survey_GM1094591345.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-delta-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-open-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-steal-roblox-shirts-free-bc_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-generate-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7F 24556 bytes
SHA-256: dc56426950bfceee20830282550fabca644cff606269de93359538986f9ed98d
font_01_sfnt_off00008800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8800 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000094a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A8 19072 bytes
SHA-256: 6e169568a9ae482d363353c9b32bd6fa73c83b786ce3b8544bd014dc862cad8d

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