PDF malware analysis — malicious · da97e56eb445fe09

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 16:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: ea725c52ba2a221a9a7d8cd39e359371 SHA-1: 282efb818de3692c5f1d15329e6387324590d2dc SHA-256: da97e56eb445fe098ad3853b234fd927d02bf2ae488c7a9abff9a2b3c4e3167c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for popular games. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-free-100-spin-link-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering lure to drive users to potentially malicious content or further downloads, aligning with spearphishing attachment tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-100-spin-link-game-hack In PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-hack_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/roblox-studio-free_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-60-spins_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/coin-master-hack-mobile_GM406889139.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
`stream_004_off0000514d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x514D	24668 bytes
SHA-256: `71ebb43957d89afb1efb43d35b473b9edfb66f483546fd51d048e78254ee56e4`
`font_01_sfnt_off000089db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89DB	18336 bytes
SHA-256: `7e778ef079ae960c06ab48a136ea41e415783434fe93bdbecaa752c7fe43c00d`

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