Malicious PDF — malware analysis report

Static analysis result for SHA-256 06249932b2d902c3…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 18:58:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 46760906cba66a1a3ed6e997282eacda SHA-1: 8fb8f7d0278ad1be7b16e703001485f084c0222d SHA-256: 06249932b2d902c3d23362e42128c1836262e1a3e9030386baaf297aee765632
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free items, which is a common social engineering tactic to trick users into clicking malicious links. The primary link identified, http://netcdn.tw/app/431946152/how-to-sell-stuff-for-free-on-roblox-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirector workflow, likely intended to deliver a second-stage payload.

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-sell-stuff-for-free-on-roblox-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-tiktok-fans-app_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/run-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-vehicle-simulator-hack-client_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pokemon-go-vs-free-fire_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-20-free-spins-link-2021_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_off0000306b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306B 21108 bytes
SHA-256: 996602b8a6fa610aa08cdb5eb0d6ee1bd0fd252803b5e717dfb9d8d657d632f5
font_01_sfnt_off00005e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 19056 bytes
SHA-256: e797d0d773c28bbe8f3365949587e1ba7e0317aa8bfcafe57cf6a14e4299c739

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