PDF malware analysis — malicious · b7d16ba77e72d696

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 06:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 63f456f375332191e7826049235af171 SHA-1: 05a09a3f8de7df80ea01f7f2a845c8aeb21b156e SHA-256: b7d16ba77e72d696a277c40b04eb50c3816471a86f0af5a360ea805ebb243e38

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/daily-spin-game-hack. This redirector is likely used to funnel users to malicious sites or download further malware. The document body and heuristics suggest a lure related to game hacks and generators, indicating a social engineering tactic to entice clicks. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

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.tw/app/406889139/daily-spin-game-hack In PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/roblox-crashes-when-using-cheat-engine_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/free-roblox-hack_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/free-staff-in-roblox_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/free-catalog-roblox-hack_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
- https://khavarrooy.com/assets/uploads/pages/files/roblox-free-robux-com_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_off0000301b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x301B	22952 bytes
SHA-256: `b1671fa0d0ed88f89f8ca4fa7e2a3a026c48183f1688ff2951fc63a3ea21f8a8`
`font_01_sfnt_off00006398.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6398	18188 bytes
SHA-256: `8f467c2aab41e5b850459f86ff5bbfe96947df836eedba9d28b4382ba6a52135`

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