PDF malware analysis — malicious · 737796b5b172fc16

MALICIOUS

PDF

43.6 KB Created: 2021-05-12 01:37:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: c40f6a1a3340bb3120fee911acd1005b SHA-1: 76e2b81c72bd4eb132f66a7eef900d1434e1130f SHA-256: 737796b5b172fc165797326239f2505bf80d60b9c249abd89bf4915b7e96a4cb

168 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The document body, though partially corrupted, contains text related to 'free spin online tool coin master' and a URL that aligns with the heuristic findings. No scripts were extracted from this sample, but the embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 5

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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/406889139/free-spin-online-tool-coin-master-game-hack In PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-com_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/get-me-robux_GM431946152.pdfIn PDF document text
- https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-card-link-free_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_003_off00004ea7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EA7	25536 bytes
SHA-256: `cc03151b1fd3fd5bc9814c965a40d33ced82e7bd16cd7bbcff0180b83650e63f`
`font_01_sfnt_off00008971.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8971	17960 bytes
SHA-256: `ccd8a57ddc21ec57658e97dd2298d9591a9512a4c36f8c476c3f4a0a1231a43c`

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