PDF malware analysis — malicious · 3c437faf1937b5c1

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 04:11:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 476939b85e4fdbcab2f36262eb6680e4 SHA-1: 679776deef2e59c37ccac2aab027135080a68f59 SHA-256: 3c437faf1937b5c17882d017953313272cdc8c2602f359445c654cfa4dc0b2d4

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors, specifically targeting users interested in game hacks and free currency for games like Coin Master and Roblox. The document body and embedded URLs suggest a lure to download or access illegitimate game-related content. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to potentially deliver further payloads or engage in phishing activities.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/how-to-get-free-spins-on-coin-master-android-game-hack In PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-free-draw_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-rewards_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/cm-spin-link_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/clients-minecraft_GM479516143.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- https://www.nara.org.uk/uploads/files/files/wurst_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
`stream_003_off00004c1f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C1F	25432 bytes
SHA-256: `ef4adaa03c64b31a4e9524295c32f510c52a7b54d066332dc83c894122bfa0ab`
`font_01_sfnt_off00008641.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8641	18224 bytes
SHA-256: `e75a85775560c8380404af7b38c0f71a56f3669257afdef98786fb98fd154819`

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