Malicious PDF — malware analysis report

Static analysis result for SHA-256 789d32db4701ba24…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 20:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 10ce22ef2db7f45cba2d51e379561b0c SHA-1: 30e6ad022203e7da82b0ed64e1828f1e08926ee2 SHA-256: 789d32db4701ba246367e7daee9913ed945a09c64266f4645746575bd8a681c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as lures for game hacks and cheats. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further stages of infection, such as downloading additional malware or directing users to phishing sites.

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/479516143/free-minecraft-server-hosting-with-plugins-game-hack In PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/robux-online_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/how-to-buy-robux-free_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/how-to-install-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/how-to-get-free-robux-enter-code_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/roblox-games-com-free_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_off00003336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3336 21908 bytes
SHA-256: 518418558572f6ac941c4bd52904caca57e6a79ad374db0038547b37e15d8415
font_01_sfnt_off000063a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 18844 bytes
SHA-256: acfaf3ec89f3d6287f10dcf224a7b6ca2fa14913dee94becfc4eecdab87a7a6c

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