PDF malware analysis — malicious · a4bfe1bfd2a67db8

MALICIOUS

PDF

44.2 KB Created: 2021-05-10 17:07:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 1e3fd2806a56715a0ac24e05dcd5cf74 SHA-1: 27338bff6cf0e8622d1fdb5b1252fe064ed76866 SHA-256: a4bfe1bfd2a67db89235c000e1c9bf27a84c95238010af23affc08c2a68ba4cd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic firing for a game hack lure, directing users to a suspicious URL. The document body and embedded links suggest a social engineering attempt to trick users into visiting a site that likely hosts malware or further phishing content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9952

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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/free-spins-for-coin-master-2021-game-hack PDF link annotation
- https://corbo.ru/images/coin-master-free-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/where-to-get-robux_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/instant-robux_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/minecraft-114-download_GM479516143.pdfIn PDF document text
- https://corbo.ru/images/free-robux-download_GM431946152.pdfIn PDF document text
- https://corbo.ru/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
- https://corbo.ru/images/free-roblox-promo-codes-for-robux_GM431946152.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_off0000424d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x424D	25748 bytes
SHA-256: `32e32b8829ebf15f93fe4b69bcac8452ef99a27a3d446856113d668d8fb4eeb4`
`font_01_sfnt_off00007ddd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DDD	3748 bytes
SHA-256: `6134eab185092b779694332996f2baaa56a793528293070909bdf6ffafc9365f`
`font_02_sfnt_off00008a68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A68	18288 bytes
SHA-256: `66febbde5b4b2b6a44609229e8681f3f0581fff3ed5f82ed8e3d83342858c217`

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