Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f886043dd1fe91…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 11:11:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b4d30e908541d737673b65e455cc07bb SHA-1: 6a2316e457f306fa90ff4a453552ea5c8631b025 SHA-256: 63f886043dd1fe91fbfcb46cf3acda5d5ce8f91ab9ccd5027c685b82a2cbcd98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, masquerading as a generator for popular games like Coin Master and Roblox. The document body and heuristics indicate a lure for free in-game items, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the primary IOC is the malicious redirector 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/406889139/free-spin-card-exchange-coin-master-game-hack In PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-hack-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-free-50-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-roblox-pokemon_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-movie-websites-tiktok_GM835599320.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/how-to-hack-people-one-roblox_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/gametest-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/autoclick-on-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/bloxawards-com-earn-free-robux-by-doing-simple-tasks_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/roblox-beach-house-roleplay-hack_GM431946152.pdfIn PDF document text
    • https://www.99champions.com/uploaded_files/userfiles/files/free-minecraft-survival-server_GM479516143.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_off0000301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301D 21820 bytes
SHA-256: 22b60f11d597804b8a27af78322d0d2922e2b5b7ac97f6c2c0a53e1760dac4f6
font_01_sfnt_off00006036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6036 18724 bytes
SHA-256: e2efc63832e3f3d0cc27554cd175031d6dce372ee88d83af1c1db3c8b92a73f2

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