PDF malware analysis — malicious · 99cbd9bd59c00d2d

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 01:51:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 1f893157791a2634edfd01e962122012 SHA-1: f88a31c99ace2a53de3c2daecafd9e2cff4b2f27 SHA-256: 99cbd9bd59c00d2d458ba08ef0673817af17caa497c4a89616f5940bb1e3f01c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing indicating it links to a malicious redirector disguised as a game hack generator. The document body and embedded URLs reinforce this, pointing to a lure for 'Coin Master Hack' and other game-related cheats. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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-version-download-2021-game-hack In PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-play-for-free-login_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/free-roblox-headphone_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-robux-generator-online-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-site-hacks_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/pubg-uc-or-ag_GM1330123889.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-shark-bite-cheats_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/cach-co-do-free-trong-roblox_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/como-se-puede-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-roblox-money-2021_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-jailbreak-money-hack-july-2021_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak-money-with-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy-nov_GM431946152.pdfIn PDF document text
- https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-roblox-bop-it_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_off000033fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33FE	22664 bytes
SHA-256: `48539c5be458ef749f89f1ef63792189da8268f00f56296ec41e4304f2a4e4bf`
`font_01_sfnt_off00006683.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6683	19120 bytes
SHA-256: `2ea2afe9e081bdd44df22ed75a54934936891e6a54f97891af8bf9d1e5be000a`

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