Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a91156df1298c16…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 22:38:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6cb276ee29a32e883a32a592524d33be SHA-1: af66a6c8c9f50f05bde0b5eb397556da7fe8e5ce SHA-256: 7a91156df1298c16069a19ce0a30ca932fd31ee2f28f087170fc6cc6ef0c324b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links disguised as game hacks and free currency generators, specifically mentioning 'Coin Master Cracked Apk Free Download'. The heuristic PDF_GAME_HACK_REDIRECT_LURE confirms these links point to redirectors. While no scripts were extracted, the document body and heuristics indicate a social engineering lure to drive users to potentially malicious external sites.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/coin-master-cracked-apk-free-download-game-hack In PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/demon-roblox_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-huge-field-fre_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/pokemon-go-free-incubators_GM1094591345.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-hack-roblox-jailbreak-with-cmd-prompt_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hack-for-texting-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/tiktok-watch-free-movies_GM835599320.pdfIn macro / runtime command snippet
    • http://akbidprimahusada.ac.id/elibrary/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-give-other-people-free-roblox-on-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-the-conquerors-3-hack-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-robux-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-how-to-hack-any-tycoon_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-its-free-meme_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elIn macro / runtime command snippet
    • 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_off0000337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337E 22380 bytes
SHA-256: 2dd3293a7637aba095ee3e06385ec8c2ca74e371028d16cac8739311b2c06707
font_01_sfnt_off00006559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 18924 bytes
SHA-256: 55716a7eef5342f175226249442460552699f57233d89bd721837c942058d113

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