PDF malware analysis — malicious · b4429348abfa48c7

MALICIOUS

PDF

45.9 KB Created: 2021-05-11 19:39:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: ec91c9e59064c95348eb5b5a446b03dc SHA-1: d689bab7bf7909d8edb471ffff4a4fdf92e6c7fb SHA-256: b4429348abfa48c7bf157e66ce95328e41a169399bd69110aee1d703afc3d026

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into downloading further malicious PDFs, often disguised as game hacks or cheats. The primary redirector URL is associated with malicious activity, and the document body contains text and URLs related to popular games, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection chain.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

Heuristics 5

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.
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.xyz/app/406889139/coin-master-link-daily-get-free-spins-and-coins-game-hack In PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-scam_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/roblox-printables-free_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/free-roblox-card_GM431946152.pdfIn PDF document text
- https://www.unicor.co.th/assets/editoruploads/files/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c56.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C56	25456 bytes
SHA-256: `15dfef22f1ee6869964d0e9d6c23bf6d1aa1d975373866046dc33495c52cf214`
`font_01_sfnt_off000085d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85D2	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008fbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FBD	18652 bytes
SHA-256: `0bf586afe4d5f3c7a2e6d5ddfec06764aa84fbd58834f3b0eff460c3a87010f1`

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