PDF malware analysis — malicious · bfa4d4d11a16682a

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 05:13:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: a00528bfd63b416e0584613a3548c0ca SHA-1: 21394466408c9f552e7ea9e7f6f2a269e5917fca SHA-256: bfa4d4d11a16682a7e3e7e533fb6c68a93d30dbb5df1e6ae798871f4b583d0df

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.tw/app/406889139/free-spin-and-coin-blogspot-game-hack PDF link annotation
- https://bookswithapast.com/ckfinder/userfiles/files/how-to-get-free-robux-legit-with-proof_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/synapse-roblox-exploit-free_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/roblox-free-headphones-2021_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/roblox-counter-blox-credit-hack_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/free-goku-ui-omen-roblox_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/free-roblox-account-username-and-password-2021_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/broken-bones-iv-hack-roblox_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://bookswithapast.com/ckfinder/userfiles/files/get-free-robux-info_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
`font_00_sfnt_off000030ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30ED	22544 bytes
SHA-256: `14b42724f0f2858a97ffdae17ff4fcc9283d5ec58cdd6843fd0a6fe7a4bc8392`
`font_01_sfnt_off0000634d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x634D	18636 bytes
SHA-256: `c3aa12ee7babdeb6c0b1a9811f65e7fb6200b21c28f2df6ba84a692599b93025`

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