PDF malware analysis — malicious · 693f2b2c7ab796e8

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 16:14:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: c0ac544a9e5ae1cc160800bfb997c936 SHA-1: 40f1497abf22036ee3ca28520049893e202ba293 SHA-256: 693f2b2c7ab796e89cd1179c76d9b039056f8497820e90a378756fc4b8b0fe06

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector URL. The document body, though heavily obfuscated, contains references to the same malicious URL. This indicates the primary purpose is to trick users into visiting a site that likely serves a malicious payload.

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.online/app/406889139/coin-master-free-spins-fb-champion-game-hack In PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-100-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-net-free_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-mgui-roblox_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/robux-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-games-that-actually-work-2021_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
`stream_004_off0000504e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x504E	25100 bytes
SHA-256: `8b4d0c5c5465ac42e2893b154d14de04406de413a4dc50b2d17d8ba3e4fd6057`
`font_01_sfnt_off000089cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89CC	18472 bytes
SHA-256: `fa7a8e9ba2b69ba0dc6be0410b8e36912589817a3711fa80dfb5f1e628eeb65f`

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