Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dbe98f19c70cc4…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 17:02:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a88019a1d9e62dbbab7b0ed41af5532c SHA-1: e081f88090098bfc6e600d21f87bceded8922f0f SHA-256: 54dbe98f19c70cc440c94b87fa92409903c413b26b75d9e8ecb06e01a47fa62f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this assessment.

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-get-800-robux-for-free-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-dragon-ball-z-skin-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-account-in-roblox-real_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-counter-blox-hack-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-links-free-spins_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_off000034d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D6 22500 bytes
SHA-256: edce4e89363bd7a45f1159682a4f1519fb258959e12a4ef6be2250b69a521035
font_01_sfnt_off000066ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EA 19368 bytes
SHA-256: be805ca657918939693b450b7256d01abf85ed37ddec4e2d86a9c4404475f57d

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