PDF malware analysis — malicious · 294226b864609bc4

MALICIOUS

PDF

49.2 KB Created: 2021-06-09 12:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: d2ff89f4d691435f7894e16f261a74ba SHA-1: 0e71f80ce131d19449b075e0a245b6db854f4ab4 SHA-256: 294226b864609bc42d8c22ac19df6c316f54dee7292c4902826a8a7184e84f41

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirect URL is https://netcdn.tw/app/431946152/free-gift-cards-roblox-2021-game-hack. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF's nature points to social engineering.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-gift-cards-roblox-2021-game-hack In PDF document text
- https://www.owlweb.co.uk/uploads/files/files/wurst-client-download_GM479516143.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/pokemon-go-free-incubator_GM1094591345.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-lovenet_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/coin-master-map_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/make-free-robux_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-robux-legit_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
- https://www.owlweb.co.uk/uploads/files/files/free-robux-gift-card-codes_GM431946152.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_004_off00005273.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5273	28024 bytes
SHA-256: `830e597b6060c2a860ac4c5f90a9400cf12b228ac4b40796905cd3d209a93ac9`
`font_01_sfnt_off000091ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91AB	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00009b5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B5D	18976 bytes
SHA-256: `48d55577de7654d4fc837ff701db0c21d54fdb9346147a5c5d2edaa71c810490`

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