PDF malware analysis — malicious · cd601067c764c3ce

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 23:47:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: b44abb289e65ea618ae92eb8c900e846 SHA-1: 8df8268558725bf06887b2ffcfa27bd0acca68d7 SHA-256: cd601067c764c3cea9e74cec0097ff92bcbf1bdd7b298f6d851bc563f449f8ad

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on them by promising free in-game currency and hacks. The primary redirector URL, http://netcdn.tw/app/479516143/how-to-get-free-minecoins-in-minecraft-game-hack, is associated with malicious redirector infrastructure. The document body and heuristics indicate a scam aimed at tricking users into visiting potentially harmful sites, likely for ad fraud or further malware delivery.

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/479516143/how-to-get-free-minecoins-in-minecraft-game-hack In PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/all-offsale-free-items-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/how-to-hack-pizzeria-roleplay-remastered-roblox-money_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/download-rc7-roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-roblox-intros_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free-mobile_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://elearning.mtsmanusaci.com/__statics/gudangsoal/files/coin-master-free-daily-spins-today_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_off0000317d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x317D	21948 bytes
SHA-256: `b689294e5ea917a331bd7bb448502542ebd6449e909cf813c03b7daf19c436e9`
`font_01_sfnt_off0000619f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x619F	18164 bytes
SHA-256: `4de9235ac99feec85e66e53b095d1f3cb07926eaf65e104d1d37f162571011a7`

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