PDF malware analysis — malicious · e5dfccc0ac8d2afe

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 22:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: de97971482f13ee45d57a10f1a6283dc SHA-1: 667e8d4159ab92a0461932ba54d035898323472e SHA-256: e5dfccc0ac8d2afed39b3fd23ea98e7301916e8af2b3f5b677748919550146d3

180 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, specifically advertising 'game hacks' and 'free spins' to lure users. The primary link directs to http://netcdn.tw/app/406889139/coin-master-daily-free-spins-blogspot-game-hack, which is flagged as malicious infrastructure. The document's content and embedded URLs suggest a phishing or scam attempt, likely to lead users to further malicious sites or potentially download additional payloads.

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) 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/coin-master-daily-free-spins-blogspot-game-hack In PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-robux-december-2021_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/is-there-a-free-coding-platform-for-roblox_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/roblox-hacks-on-computer-2021_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/roblox-how-to-play-welcome-to-bloxburg-for-free_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
- https://www.mpos-organs.com/uploads/files/files/coin-master-free-spins-link-2021-hack_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.

Filename	Kind	Source	Size
`font_00_sfnt_off000032b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32B6	22480 bytes
SHA-256: `3fcf873544b645fa11e3c03d94325025d5bfc8cd16ca722b38601f340c414158`
`font_01_sfnt_off000064d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64D3	18812 bytes
SHA-256: `754165e748b1939f240fb960abb57fbe544f87d1813c38e81129662f3dc27bc1`

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