PDF malware analysis — malicious · cfd0abbdc24dda38

MALICIOUS

PDF

45.2 KB Created: 2021-05-16 18:30:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 93210c9a1d3a2f2419a743e88f0d917e SHA-1: 88acd13dee860b6694ab6ee1c84766bcd960f7b0 SHA-256: cfd0abbdc24dda38b27a0119446b858400344c7d745fd6baa771cb6df6d77c30

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a security-bypass lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9621

Heuristics 5

PDF links to a 'free generator / game hack' redirector high 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.
Security software disable instruction high SE_SECURITY_BYPASS

Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
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
External URI info PDF_URI

PDF contains an external URL action
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/how-to-make-robux-on-roblox-game-hack PDF link annotation
- https://www.bumbar-sport.hr/files/roblox-money-hack_GM431946152.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/roblox-free-items_GM431946152.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/minecraft-handbook_GM479516143.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/client-minecraft_GM479516143.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
- https://www.bumbar-sport.hr/files/coin-master-hack-2021-no-survey_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
`stream_003_off00004709.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4709	25144 bytes
SHA-256: `b6c116692ea0989fe72935284652538a1668e6ece2dd118b98dee30ac0c47643`
`font_01_sfnt_off0000802f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x802F	5596 bytes
SHA-256: `9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5`
`font_02_sfnt_off00008cd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CD7	18680 bytes
SHA-256: `4ee66bb7c80a3238b98a264a09ad062de9bd506d82a8120fadf8a4fb1bc8e733`

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