PDF malware analysis — malicious · a8ed1ae47bbcb3df

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 00:43:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: df6404ec75798ac1bcd1bba62f6a9f3e SHA-1: 4fa0cb02985a842a1940e4dfb754da9cc8d3263c SHA-256: a8ed1ae47bbcb3df51645ac78e120f669a532d4444a8d6e6f5b288bc0cfe8999

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including a critical redirector link to 'http://netcdn.tw/app/431946152/get-free-robux-game-hack', disguised as a lure for game hacks and free currency. The document body and heuristics indicate a scam or phishing attempt, likely designed to lead users to malicious sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9824

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/431946152/get-free-robux-game-hack In PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-robux-pins-for-sale_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-roblox-game-card_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/freerobloxde-hack_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-clothes-on-roblox-catalog_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/restaurant-tycoon-2-for-free-today-roblox_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-to-hack-the-creater-roblox_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/robux-hack-real-one_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-from-meep-city_GM431946152.pdfIn PDF document text
- https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/robux-free-c_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_off00002c7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C7C	21844 bytes
SHA-256: `e035f9c081fc42eeb8a5384dfa30fcf8ffcc6e675003259095d54fdbb6034c19`
`font_01_sfnt_off00005c56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C56	18820 bytes
SHA-256: `04d56578d6fa3a791f42370f0ef4c3dea66af1fdc194d67c4390c65d423efb6d`

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