Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc414617b8e6da8…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 01:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0630cf17d997e0072564427d9fe90306 SHA-1: 9e4842ad76c12be221aa01c5f8113b8a31291310 SHA-256: 9bc414617b8e6da88f29c3bab357b6fa2d21dc4fe68cd95398b506eb68d169c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, that lure users to websites promising free game currency or hacks. The document body explicitly mentions 'Roblox' and 'Robux Generator', reinforcing the phishing lure. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or malware delivery.

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/what-do-points-do-in-roblox-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-obtain-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-money-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/como-hackear-juegos-de-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-skin-maker_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_off0000303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303F 22200 bytes
SHA-256: e275ebcba8ca9af097d030dea6f3d7a87fe07ca3e4bb2833f7462496f4d1d273
font_01_sfnt_off00006171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6171 19396 bytes
SHA-256: a62d5346b0f2835f2e75e1eb1b6dd5b50eccd81c08c9e1227801707628a7190c

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