PDF malware analysis — malicious · 11fc49611bdb7b51

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 01:17:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: b27d5270b3035977fc3d1bbbaf4eee90 SHA-1: f6a064e0fdaeded492a923e7bf5ddf5467c49c70 SHA-256: 11fc49611bdb7b51d65e75e198ff5270f471a6d740fe2890e22fa80107d15462

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-free-game-hack. The document also contains a large number of links to external PDFs hosted on elearning.mtsn1kotabekasi.com, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the overall pattern indicates a phishing or scam lure.

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/minecraft-free-game-hack In PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/can-you-use-cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/free-games-at-roblox-com-htm_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/how-to-get-free-roblox-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/how-to-get-free-robux-new-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/roblox-ninja-simulator-2-cheat-engine_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/robux-apk_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/robux-for-kids_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/galaxy-beta-roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1kotabekasi.com/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.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_off00003324.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3324	22976 bytes
SHA-256: `600b450fcd94c6c35713dc9a63b4af210531c38f92ffa706d26898fca6d9f8dc`
`font_01_sfnt_off0000665a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x665A	17856 bytes
SHA-256: `cc1e3add4a04a98446b1b55314af2162444863ccaf169a3449495116b9daf471`

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