PDF malware analysis — malicious · 4970a79f2400c0b0

MALICIOUS

PDF

48.1 KB Created: 2021-05-14 17:37:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 4166321b54359dc3eda9918b4c9d8a47 SHA-1: e1b89c92e75041f0af3f2100b1eb3236bb635434 SHA-256: 4970a79f2400c0b08f976fa4cc4ab55ee26f389a04839c225c0d966c22fa84db

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at `https://netcdn.xyz/app/431946152/free-robux-wheel-game-hack`. The document body and heuristics indicate a lure for game hacks and free currency, designed to trick users into clicking these links. The presence of a large number of external links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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/431946152/free-robux-wheel-game-hack In PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/robux-cheat_GM431946152.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/optifine-pe_GM479516143.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
- http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004a64.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A64	29576 bytes
SHA-256: `937fa6655ef3c053ae86f6fd6865cd5d847c4f5206b8403d533863324e5172b1`
`font_01_sfnt_off00008f74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F74	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off0000995e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x995E	18452 bytes
SHA-256: `2e7982e98076b23ded81992615fd9156783bf43ce379c6908e3793bc8f10067b`

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