PDF malware analysis — malicious · ddfd7d24003be225

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 04:48:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: c4ebd3b147d836632f52e86a1eb762b7 SHA-1: 42bf8a76b3363ab9fef32385192bf16710777a71 SHA-256: ddfd7d24003be225797d1bfdf2941fea78abbbc89931019b440a8c274cafb7cd

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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 http://netcdn.co/app/431946152/free-roblox-groups-2021-game-hack PDF link annotation
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-images_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/10-robux_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/wurst-18-9_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/broly-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/will-minecraft-dungeons-be-free_GM479516143.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
`font_00_sfnt_off000030cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30CB	22000 bytes
SHA-256: `203f4799216e11dbfc90d3f955fe162d7338f3c8139e6d1abc16b0b96b9b2a9a`
`font_01_sfnt_off00006166.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6166	19368 bytes
SHA-256: `6d3662a9a3fe83a46130d7cee386cb200a0d3b4fb442510ce9ce82589a6c4970`

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