Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8abe72b4d045681…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 14:35:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d7448b24880218a2d78570ad0f223e09 SHA-1: bb5a8a2c32d5ffaf2bc506c9c1f065603ef6561e SHA-256: f8abe72b4d0456810ddd5a2a9531b7dc7c3dc3e7f3035b5c2208001cab93f0b0
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, that lead to sites offering game hacks and free currency. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a 'free generator / game hack' which is a common social engineering tactic to trick users into visiting potentially harmful websites.

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/free-coin-master-spins-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-recieve-instantly-no-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hacks-in-mining-sim-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-shavaco-do-song-code-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-roblox-accounts-on-laptop_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-roblox-weight-lifting-simulator-3_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/has-roblox-been-hacked-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-games-play-now_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/v3rmillion-roblox-account-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-obc-and-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-no-verification-2021-mobile_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/i-want-free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-from-joining-a-group_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-rap-battles-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/aimbot-hack-for-roblox-phantom-forces-for-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-20210-robux-on-roblox-2021-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-change-values-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/my-robux-generator-free-robux_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
stream_002_off000033f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F9 22924 bytes
SHA-256: edbcf690657bf89119bf8192c4c68d4adc331719364a0a05af2ffec9c99855ba
font_01_sfnt_off00006751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6751 18176 bytes
SHA-256: d879af8bc9fc9deb269bc048f5c37c8554bb873823b666d5fc770bf8781c9e47

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