Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cbfb1c1fcfb2b7…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 03:45:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 893d76755cb498aa96759ecdd77c5ae9 SHA-1: c6404496c5a95ae710454514be1295110527ca75 SHA-256: 96cbfb1c1fcfb2b7c607afc0141be08530f9d11487f3aca79546a7f7997b458d
160 Risk Score

Malware Insights

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

The PDF contains embedded links and document body text that explicitly advertise 'free generator / game hack' lures, specifically mentioning 'free Robux'. These links redirect to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the document's structure and content indicate a phishing or scam attempt designed to trick users into visiting a malicious URL.

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-free-robux-fast-game-hack In PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/roblox-for-free-no-human-ferification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/roblox-warning-message-cheating_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000350d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350D 22544 bytes
SHA-256: e9ef1f2aad3174e125fa7ad88a648f5efa6386a6cc47adb638b5a0eeb04d5c79
font_01_sfnt_off00006758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6758 18984 bytes
SHA-256: bed0a7dac96498375f4eaea59b570525fab5ec2b3fb3a823c1f5d212ca36b463

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