PDF malware analysis — malicious · 4b875709ea99aa3b

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 00:43:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: adaaa539ea65a0e912fdad5da0ffc22a SHA-1: 948673f1edb1fcb466000bf182b03378019d5d42 SHA-256: 4b875709ea99aa3b23e05056e28f3026f2be85b5fe00b39cc7188152a668bee1

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 what appear to be game-related hacks or currency generators. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/406889139/100-free-spins-for-coin-master-game-hack`, indicating a phishing or scamming attempt. The presence of multiple SEO-optimized PDF links further suggests an attempt to distribute malicious content broadly.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/100-free-spins-for-coin-master-game-hack In PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-roblox-com_GM431946152.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
- https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-online-generator-without-human-verification_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
`stream_003_off00004b72.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B72	24636 bytes
SHA-256: `7abcc63d84f0da96f2fa78ac5ad51295f42d0706f1afab867a2edf70f950e38f`
`font_01_sfnt_off000083b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83B2	18164 bytes
SHA-256: `7606299dfa9380825ccbbaa06a4275f303ebe4faec3a3444b55fb030233e8f05`

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