Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abefdd120bc31ae…

MALICIOUS

PDF

47.8 KB Created: 2021-06-11 04:47:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d42e0ffc0de1fe6eae2ac635e151b0e7 SHA-1: ad0a72dfb097f9ce5c6d9cb93882f6a3a14eecc0 SHA-256: 3abefdd120bc31ae965a81d902c47b58a5ea67ac619ceb0de3f33301e894ac26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting a 'game hack generator'. The presence of a visual download button further encourages user interaction. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/yarxvin-roblox-hacks-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/where-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-any-face-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-to-take-roblox-eye_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005106.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5106 24924 bytes
SHA-256: 787941773201898ad5914804971a7f2ee923149d1b37e68a6355d0fffaf2e861
font_01_sfnt_off000089ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9364 19824 bytes
SHA-256: a19b9cb3fdffbb0bdb78031133c8540c0e0546e6c46f8ec43e95521fe717227b

Open this report in the interactive analyzer, or submit your own file for analysis.