Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d60bc6830ffdb9…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 21:43:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f12a8b188e4e6b67c6d2c6a269252fe2 SHA-1: 09b7e3640f4af2afb25fe61c921311395570822c SHA-256: 05d60bc6830ffdb97c60b38b9dd6a87aadd46fa768e0d4e6678eb34871c360ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as offers for free game currency and hacks. The primary lure URL is http://netcdn.tw/app/431946152/free-robux-live-game-hack. This indicates a social engineering attack aimed at tricking users into visiting malicious infrastructure. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/free-robux-live-game-hack In PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/lootbux-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/speed-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-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_off000031c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C3 22680 bytes
SHA-256: dce912eaa611c3147bbb81bb9e2e2b9a87c66a2493df6cbfbc9143aeebfd7740
font_01_sfnt_off00006494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 18952 bytes
SHA-256: d22dcf80f41983911a212d4acfd48803d5c09337ade448c07c06130db19206b8

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