Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab3cd8f07db5397…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 20:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: aba91cab974dd7316b9a946b5d0b25b8 SHA-1: 639bd07b51bcbf487161434df08649a3138d11fa SHA-256: 3ab3cd8f07db53978acce20344af820d51199ff6d9713fb6bb56fd5d710e833e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other PDF files, masquerading as game hacks or generators. The primary lure is 'Ways To Get Robux', directing users to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/431946152/ways-to-get-robux-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-qiymeti_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/codes-for-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/this-game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/2021-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-for-roblox-pc_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacks-para-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/code-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/is-roblox-free-to-play-on-pc_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-roblox-troll-gui-synapse_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_off00002e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E66 21704 bytes
SHA-256: bdefece95b2b2a16d1b62181ac84628c62b857a8140ee4c6b7dba9a1ee3fe8e4
font_01_sfnt_off00005e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 19036 bytes
SHA-256: 787651615d66926e82d15e7a5b055faa0170abff1f905efbd9e1367ad3c85c0c

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