Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fb58ce3bf84401…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 17:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 49c7a2684ecd4291e8f5781859795059 SHA-1: 5cf3593615dc0f4711208c15cca28b3b4707caf2 SHA-256: 99fb58ce3bf8440129153b9dd11eb83d5c4e9efa7a089f0112d3a9d39ab07c0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and generators to trick users into clicking embedded links. These links redirect to malicious infrastructure, specifically identified as a redirector, which likely serves to host or deliver further malicious content. The ML classifier strongly indicates maliciousness, and the presence of multiple malicious redirector links supports this assessment.

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.co/app/431946152/roblox-hacks-download-free-dll-game-hack In PDF document text
    • http://shapemybrows.id/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-today-app_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/tampermonkey-robux-hack-that-works_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/cm-spins_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-hack-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/free-robux-net_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/roblox-builders-club-free-2021_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://shapemybrows.id/images/roblox-song-code-for-cheat-codes-nitro-fun_GM431946152.pdfIn PDF document text
    • http://shapemybrows.id/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://shapemybrows.id/images/pokemon-go-free-zekrom_GM1094591345.pdfIn PDF document text
    • http://shapemybrows.id/images/how-to-play-minecraft-for-free-on-pc_GM479516143.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_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 22408 bytes
SHA-256: 9befad507308601a2cf4e4bb482cae1a1b3b8251b96bb3c4692199788a8a2a5b
font_01_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 19328 bytes
SHA-256: 186cd14fc7b8ee9df995139fbfc2afb0896cdd50c35a2b670244e2dba7f3cc33

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