Malicious PDF — malware analysis report

Static analysis result for SHA-256 c896b3c3934527ef…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 08:48:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6520f10c107e1d087debe3cfa7ce071c SHA-1: 097f344f961ea745c2f4bf5e94df619fef849f98 SHA-256: c896b3c3934527efcd51dcb5d6530b22b3178d17e15d0972a6e2497a6e66f8f4
180 Risk Score

Malware Insights

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

The PDF document contains multiple links to websites that are flagged as malicious redirectors, promising game hacks and free in-game items. These links likely lead to further malicious content or phishing pages. The document's content and embedded URLs strongly suggest a lure for users interested in game exploits, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/get-free-food-in-coin-master-game-hack In PDF document text
    • http://global-brand.net/userfiles/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-dbn-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/gamepasses-roblox-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/tiktok-free-search_GM835599320.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-apk-mod_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_off0000318d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318D 22420 bytes
SHA-256: a4014e270fad446dd8dd378dffad186f29ef890d3cda88814692d2d9d1515d01
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 18172 bytes
SHA-256: ac69d33312cfc314850f17f2230382435619f33a7bedb8e520c034881f6e9c93

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