PDF malware analysis — malicious · 062f33c477add0b5

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 15:03:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 52158f27871225ab1922d3a2b615873c SHA-1: 5202f1ad3acb57dc01399e60dd8d2b9a572c33b3 SHA-256: 062f33c477add0b526897e06e2e6f8b0e6a46b8eda8e393994947bbef8dffaca

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and SEO-optimized PDF files, masquerading as game hacks and currency generators. The primary redirector URL is http://netcdn.tw/app/406889139/how-to-get-free-spins-on-coin-master-iphone-game-hack, which is flagged as malicious. The document body and heuristics indicate a lure to external content, likely to download further malware or phish for credentials.

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/406889139/how-to-get-free-spins-on-coin-master-iphone-game-hack In PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-download_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-gift-cards-2021-codes_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-iphone_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/learn-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/real-robux-codes_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-jouer-avec-un-mec-qui-hack_GM431946152.pdfIn PDF document text
- http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/roblox-money-hack-amd-city-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-cheats-pc-2021_GM479516143.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_off00003069.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3069	23196 bytes
SHA-256: `6d7d31bea68b0eaf1c700dd848a9bd40bcd22d227c247e760dffecca63cda1cf`
`font_01_sfnt_off0000646d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x646D	18504 bytes
SHA-256: `fb94ba828be114796ce33ae88e534852be4d565d50d53dd599267a6729c84c7e`

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