Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6331458f0bb3ff…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 18:05:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8b8d32ce5f4002e1b39bc7a2ed6997f0 SHA-1: 8f276550244597b836e8c425d00636f8da32ea86 SHA-256: ec6331458f0bb3ff32b97f395f797184d17815b5f29cdbc27b8e9ebb53ef1ef6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link associated with game hacks and free generators, specifically pointing to 'http://netcdn.tw/app/431946152/free-robux-ad-game-hack'. This URL is also present in the document body, suggesting a lure to download or execute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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-ad-game-hack In PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/getbucks-me-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-robux-aidain_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/hackes-for-money-for-sunset-city-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_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_off00003218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3218 21668 bytes
SHA-256: ba24146d1a576cf908ca557be11aa9a92ccadf8ee12aaa802214798a1a3c63f7
font_01_sfnt_off000061ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 18888 bytes
SHA-256: fed93a57f9ebc49998933260645548d38829a68d40f64c31f5643833283864c8

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