PDF malware analysis — malicious · 23bebde10672d10e

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 16:26:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 85307d21dc1ae1a0b4a741e35f729293 SHA-1: 87c7a8870a629bdc8d10d13b839a1d7a35b51a9a SHA-256: 23bebde10672d10ed6d345db3449c0dafade8acbbf56defad0b57e8987d20f1e

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites offering game hacks and free currency, such as Robux and Coin Master spins. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-website-game-hack, is flagged as a malicious redirector. The document body and heuristics indicate a lure for users interested in free in-game items, which is a common tactic for distributing malware or leading to phishing sites. No scripts were extracted, but the extensive link farm suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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.
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/431946152/how-to-get-free-robux-website-game-hack In PDF document text
- http://ycstamping.com.tw/image/data/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/fly-hack-in-eny-roblox-game-phone_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-100-robux_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/roblox-how-to-make-a-free-admin-game_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-robux-3-steps_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/roblox-jailbreak-free-money-codes_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- http://ycstamping.com.tw/image/data/files/free-robux-adder_GM431946152.pdfIn PDF document text
- https://www.roblox.com/.IIn 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_off000032bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32BB	22484 bytes
SHA-256: `6084c81d57c083b912282faaf9af028e2a415ee62714117415eae9991ec7b849`
`font_01_sfnt_off000064cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64CC	19304 bytes
SHA-256: `c93debd830b422eae21ec10a608c2d09d6fed7207bb4c45cee900aa0b721bbbd`

Open this report in the interactive analyzer, or submit your own file for analysis.