PDF malware analysis — malicious · 873f39c40cb61d09

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 09:51:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: cd9e1a6e4e8b76a53261e03c101a1e0e SHA-1: 244ea1cbbda9d39136b3e99972f410fa94115156 SHA-256: 873f39c40cb61d092ce2d9bd9530b2d1240b24bbf7ec9f615a0ac8ef3579ab21

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, masquerading as a game hack generator. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious redirection workflow.

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/coin-master-hack-2021-android-game-hack In PDF document text
- https://trustindoutama.com/assets/CKImages/files/cheats-roblox-highschool_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-free-hoodie_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/download-roblox-on-computer-free_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-how-to-cheat-on-fantom-forces_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/video-roblox-promocodes-for-free-wings_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-free-robux-on-computer-inspect_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-hack-for-rocitizens_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/get-free-bc-tbc-obc-roblox_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-rust-free_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-gun-hack_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/cheat-for-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-rs-in-roblox-free-2021-without-hacks_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-hack-granny-roblox_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/get-free-robux-here000webhostapp_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_off00002dac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DAC	21844 bytes
SHA-256: `dfcd1b76d5d214b2647137b2076e49ddb62b0b5535ff02fa971e63082dff69a5`
`font_01_sfnt_off00005df5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5DF5	18580 bytes
SHA-256: `f67f88b1ce6c5db430876b5da8c68a5518a964090ab37f1ab5b5be580e390e4d`

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