PDF malware analysis — malicious · 39f589d39c31be8f

MALICIOUS

PDF

29.0 KB Created: 2021-05-10 19:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 29d08cdaf3a36faa0b3f4643c6d02cbd SHA-1: 0c127c297055d72ef1abcbf2247786f5b99768c2 SHA-256: 39f589d39c31be8f3e5cf17c62b1f22e16ad65ee9a813ea7b7671b7014b78631

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game currency ('Robux Generator') and presents a deceptive download button. It contains links to known malicious redirectors, indicating an attempt to funnel users to potentially harmful sites. The ML classifier also flagged this document with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9774

Heuristics 4

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.
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/robux-generator-without-human-verification-2021-game-hack In PDF document text
- http://installer-m.ru/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
- http://installer-m.ru/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
- http://installer-m.ru/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- http://installer-m.ru/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
- http://installer-m.ru/images/fbchampion-com_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/village-4-coin-master_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
- http://installer-m.ru/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://installer-m.ru/images/coin-master-2021_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/free-card-link-coin-master_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- http://installer-m.ru/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
- http://installer-m.ru/images/minecraft-bedrock-hacks-windows-10_GM479516143.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
`font_00_sfnt_off00002164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2164	19688 bytes
SHA-256: `4db1f3dc028bed3d4e87b93c262ff4240099c3387b7fede49601dba7e4574ba8`
`font_01_sfnt_off00004af3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AF3	19464 bytes
SHA-256: `f789a92eb4e3e9a572f5d65fac952670f1076f83a5b5b6da232cdf2fa887f2ed`

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