PDF malware analysis — malicious · fc6990b39a9d000d

MALICIOUS

PDF

48.8 KB Created: 2021-05-15 05:18:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02

MD5: af5cd3867c7bf855f4d47158b0c9a843 SHA-1: f827c142142b16c49558215b432c3e0e9ea8dbce SHA-256: fc6990b39a9d000d8c8d810ffa6de32d89f10dcb361b5478327ad8b9f739e433

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and SEO link farms, specifically targeting users interested in game hacks and free in-game currency. The document body, though heavily obfuscated, contains references to 'Coin Master Hack App 2021' and a URL that aligns with the heuristic findings. The presence of numerous external links suggests an attempt to drive traffic to potentially malicious or ad-filled websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9228

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/coin-master-hack-app-2021-game-hack In PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/roblox-ftw_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/google-roblox-games_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
- http://www.itmnc.com.au/uploaded_files/userfiles/files/real-free-robux-generator_GM431946152.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_off00004efa.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EFA	25088 bytes
SHA-256: `a4d1eaa4c2c328b2617663b7bda37b5de868e6be3b1d75a55414e6444c0af9d8`
`font_01_sfnt_off0000879c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x879C	8676 bytes
SHA-256: `e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468`
`font_02_sfnt_off00009c27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C27	18296 bytes
SHA-256: `bf349ca5353405da50dde13ab4b8c776ba4b0a629ab8eb4a4600605684f4a994`

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