PDF malware analysis — malicious · 7710c85194c4c197

MALICIOUS

PDF

47.0 KB Created: 2021-05-17 17:55:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 307536a568eef935fe47480106e0ef61 SHA-1: 79bd9caa9027d1f47b391c618023de3be1f8a98b SHA-256: 7710c85194c4c197fa3ca240afdf3a5535d20e75c64c6ccf6fe060c4882922f4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a known malicious URL associated with 'free Robux' lures. The document body and embedded links strongly suggest a social engineering attempt to trick users into visiting potentially harmful websites. The presence of multiple PDF-specific heuristics related to malicious redirects and lures indicates a high likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/free-robux-working-game-hack In PDF document text
- http://achauco.vn/public/upload/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/game-give-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/best-free-spins-for-coin-master_GM406889139.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/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/no-human-verification-coin-master-hack_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_off00004599.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4599	27276 bytes
SHA-256: `5e5d6edbb0d301f8925f3da418f7da96310b84340f38a556572f687cb42f7482`
`font_01_sfnt_off00008367.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8367	6700 bytes
SHA-256: `ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27`
`font_02_sfnt_off000093a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x93A5	18788 bytes
SHA-256: `146362cb081aa7c6718ebc51132ca2538876dc1922f8d33668898621d3d02efe`

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