PDF malware analysis — malicious · 37f90f1e1eb26391

MALICIOUS

PDF

44.8 KB Created: 2021-06-11 03:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 2ba52b41b39b619f1afd808e89cc8b9b SHA-1: 49bfcf6423a30aadd4c50821ffec03acc2e4464f SHA-256: 37f90f1e1eb263913dd07b77b473ae67e6acf47a116457255072b5edd263ddb2

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and other suspicious URLs, disguised as 'game hacks' and 'generators'. The document body and embedded links suggest a lure to trick users into downloading potentially malicious files or visiting phishing sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-hack-someone-on-roblox-2021-game-hack In PDF document text
- http://achauco.vn/public/upload/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-god-mod-hack_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-old-roblox-account-new-may-2021-ebay_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-uncopylocked-roblox-games-mega_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/real-minecraft-for-free_GM479516143.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
`stream_004_off0000509e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x509E	25036 bytes
SHA-256: `c603529d790314097d9323f9d4372a202e35547fdc64e2cafda537c5bf5bc59c`
`font_01_sfnt_off00008a44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A44	19008 bytes
SHA-256: `49061f40318a6477ee9a5e6d975cd4deeb06767f98a437ed95806bb075b6fd17`

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