PDF malware analysis — malicious · 4bee51246e617080

MALICIOUS

PDF

33.3 KB Created: 2021-07-09 01:38:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 09bde937e56c1a75835753071ab019a5 SHA-1: 85c5b0e0dcbb5ab02e97cc3ddb68767d2e76e7b0 SHA-256: 4bee51246e61708011154cedc60ba5477d804b00f5e9774ae783cc2f4b971410

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising a 'game hack generator'. The primary link, http://netcdn.tw/app/479516143/wurst-mc-game-hack, is identified as malicious. The document body and heuristics suggest a lure for users interested in obtaining free in-game currency or cheats, which is a common phishing tactic. No scripts were extracted, but the presence of malicious links and the lure pattern strongly indicate a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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.tw/app/479516143/wurst-mc-game-hack In PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/hack-robux-2021-fr_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-free-clothes-promo-codes_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-images_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/hack-downloads-for-roblox_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-free-robux-without-scams_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-hack-someones-account-on-roblox-2021-february_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-fre-robux-inspect-element-not-fake_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-give-away_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-hack-roblox-vehicle-simulator-money_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-hack-executor_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_off00002fb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FB1	22000 bytes
SHA-256: `21ab0c9a0e41c8134a8c7ed9565137facf59c35679fd427d3e8ed8bb78875485`
`font_01_sfnt_off00006014.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6014	18072 bytes
SHA-256: `f2e49008d51297eeb1fc8be2ba2f15def21feb23153b94f58eb81aee8282afc5`

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