Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dbc9fb27eea174…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 11:37:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b472f06edb3642b1d3b52c6b9de1929c SHA-1: ead9096b732a8f1f0389df9d32f0ac5ff484c3d0 SHA-256: 72dbc9fb27eea174e46979aa2b71ea74a037334769da47985cb3f305e97880d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary malicious URL identified is http://netcdn.co/app/431946152/pokemon-brick-bronze-roblox-cheats-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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/pokemon-brick-bronze-roblox-cheats-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-printable-roblox-pictures_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-the-conquerors-3-cheats_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/wix-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cbro-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-no-survey-no-password-no-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-robux-generator-hack-softonic_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-free-apps_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-use-a-cheat-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/dragon-ball-flaming-path-hack-roblox_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_off00002fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDE 22232 bytes
SHA-256: a6bbc39684d65b46fb54e0da4cacebd9aaaafaecf720783426b2cd38c1c7ed75
font_01_sfnt_off000061a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A0 19544 bytes
SHA-256: 7ef48405647026ba8c34f2bac547ee5173630ead785d8c86a74e9c24df696629

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