Malicious PDF — malware analysis report

Static analysis result for SHA-256 120f69edc9c97a6a…

MALICIOUS

PDF

33.4 KB Created: 2021-07-08 23:22:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1cb02d347c0adfba9655f427f0f51f82 SHA-1: 0b48b2289d887512034a22fe92a1e659a7b8e769 SHA-256: 120f69edc9c97a6ae26ba6f9e7bc86586058cb7c1dfee16679a593aac7144ccb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a document body that lures users with promises of free Robux and game hacks. These links redirect to known malicious infrastructure, specifically http://netcdn.tw/app/431946152/how-to-actually-get-free-robux-game-hack, indicating a phishing or scam attempt. No scripts were extracted, but the presence of embedded URLs and the nature of the lure strongly suggest a social engineering attack.

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/how-to-actually-get-free-robux-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/big-brother-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-mad-games-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-very-easy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-roblox-lumber-tycoon-2-fly_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/bear-face-mask-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-cheat-dungeon-quest-fr_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-accounts-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-into-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-yu-hack-big-brother-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-mad-paintball-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/fray-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-robloxxxx_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-prison-life-hack-gui-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-app-2021-download_GM406889139.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_off00002cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD0 21812 bytes
SHA-256: 9c06f83179f3b3aef613cdd4128d6f3ab52a50ee7c61ecb33fde4a7c97970dc6
font_01_sfnt_off00005ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA9 19240 bytes
SHA-256: caa3459e2df0c933814d087edfbfcbd5173e9d054867d82a012ee6c61ee7aa1c

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