Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ff8913bf9bd478…

MALICIOUS

PDF

51.3 KB Created: 2021-06-09 04:00:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f7872c4eb19ede9c5a3b33cc332faf96 SHA-1: 69bace9ed323e47d5aba8f2fe181f13f9ea90d17 SHA-256: 53ff8913bf9bd478550a0e319287c69e07b99f46740c7eff65b74f13db52adbd
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The document also presents a fake CAPTCHA to trick users into interacting with these malicious links. The embedded links likely lead to further stages of infection or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-admin-commands-hack-2021-game-hack In PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-roblox-bodys_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blogger_GM406889139.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_off000055f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55F0 28256 bytes
SHA-256: 32e65406b01b7237d84002f7123fc714852f177cb764787d1d93f3e456ddddc0
font_01_sfnt_off0000966a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37C 19140 bytes
SHA-256: e6bebdfba89397e21034ca602806068ea5be6ab2e60506f83774ec3c6e0e1899

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