PDF malware analysis — malicious · 737b0453543fa14e

MALICIOUS

PDF

34.2 KB Created: 2021-06-25 06:56:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 5b1ca5601857f64821897558eeed4309 SHA-1: 35a32d96d11464c04a542d16b0f1cb068bd33ef0 SHA-256: 737b0453543fa14e0cc0ff6a6c5ed0ec3873c1be822964fb4b25c9293fcc47ad

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure. The document body and heuristic firings indicate a lure for free game items, specifically targeting Roblox and Coin Master players. The primary malicious URL identified is http://netcdn.co/app/431946152/get-free-roblox-game-hack, which is likely used to deliver a secondary payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/get-free-roblox-game-hack In PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/non-noob-for-free-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-roblox-hack-for-apocoleps-rizing_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/rbxcity-free-robux-instant-pay_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/can-i-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-dungeon-quest-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/www-roblox-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-free-wings_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-sand-simulator-infinite-backpack-code-hack-android-noscript_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-hack-robux-pastebin_GM431946152.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_off00002f8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F8A	22492 bytes
SHA-256: `5339f0202e65807533a7083a55f605d8c8987be5329f1b782bd691df61be5fb2`
`font_01_sfnt_off00006190.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6190	18752 bytes
SHA-256: `8f306cb72d35d07e81842eac0517dc69238a93bc49615aa8c83c44127ce61c23`

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