PDF malware analysis — malicious · 05d7bc1c99f668d0

MALICIOUS

PDF

50.2 KB Created: 2021-06-03 05:58:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3d0dbaafb2628bce797a51d80998166f SHA-1: 15e93a5741addd1ce28411dbb36eaa33d3173e26 SHA-256: 05d7bc1c99f668d0c53833fa7795d546554075fb0c73f234f9558269eb140fbb

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9734

Heuristics 5

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.online/app/479516143/how-to-get-minecraft-realms-for-free-game-hack PDF link annotation
- https://vosco.vn/uploads/vosco.vn/files/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-cheats_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005239.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5239	25780 bytes
SHA-256: `c063f836188d1dd2eddc8eee5625cfedbb30f312957a720807a770def4e8eae4`
`font_01_sfnt_off00008d28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D28	3064 bytes
SHA-256: `d9e1f01a0be53710d5c3c8a3d3d1168b4bde0934057d33d8896a7e6e862e855a`
`font_02_sfnt_off000097aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x97AA	2816 bytes
SHA-256: `4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f`
`font_03_sfnt_off0000a1bb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA1BB	18208 bytes
SHA-256: `e7f5766237207d24130a790e1d2d61f15d85f871af5599da5b7787abafcff996`

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