PDF malware analysis — malicious · fcc4d949ea3da1ce

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 06:31:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 79b912fdc6629262c11a49c4c19066e4 SHA-1: a52ba44adb24fcfe41ec514fc047c446e73b5b32 SHA-256: fcc4d949ea3da1ce206c6d5b8f813e26d1191b622610baf2a5e08629181f2ccb

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links designed to lure users to "free generator" or "game hack" sites, with a primary link redirecting to malicious infrastructure. The document body and heuristics indicate a "game hack" lure, and the presence of numerous external PDF links suggests a link farm or SEO poisoning tactic. The ML classifier strongly supports a malicious verdict.

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 https://netcdn.xyz/app/406889139/get-free-spins-on-coin-master-2021-game-hack In PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/give-free-robux_GM431946152.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
- https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_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
`stream_003_off00004e27.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4E27	25396 bytes
SHA-256: `722a1939aa689f069133e0b1836ba590133a3777e9f8211adde84dbfa1ed49ca`
`font_01_sfnt_off0000881b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x881B	19616 bytes
SHA-256: `9d116fc4885dd519c5f5db55aa1801004a6ce90c55e2ac99587076b339c88cc0`

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