PDF malware analysis — malicious · c1f409853bfabf06

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 09:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14

MD5: ae8893832ff365fcd26d1e3abbc6fba6 SHA-1: 688c9b69efeb195d97eb00b5e080d18a82ca68af SHA-256: c1f409853bfabf0630763bd671da9323cdb4bfc29e6373a9ed233f1c22ee75f8

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free items to trick users into clicking malicious links. The embedded links direct to known malicious redirector infrastructure and a large number of SEO-optimized PDF files hosted on `ugericabs.com`, suggesting a link farm or content-laundering operation. The primary malicious URL identified is `https://netcdn.online/app/431946152/hack-teleport-roblox-jailbreak-2021-game-hack`.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/hack-teleport-roblox-jailbreak-2021-game-hack In PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/give-me-robux-now_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
- https://www.ugericabs.com/uploaded_files/userfiles/files/get-free-spins-coin-master-october-2021_GM406889139.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
`font_00_sfnt_off0000532e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x532E	25908 bytes
SHA-256: `82aed6e66fb38d8cb4b09a284538c5850d5489cc5655d5d5e72537c76e72127c`
`font_01_sfnt_off00008ee4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EE4	2820 bytes
SHA-256: `d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b`
`font_02_sfnt_off0000987f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x987F	19148 bytes
SHA-256: `762c1a5dcb7663c81aa7c6166c28f07e598ae9dba2415321df6f56291cdf6400`

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