PDF malware analysis — malicious · 748977e1aedd6665

MALICIOUS

PDF

44.9 KB Created: 2021-05-11 23:04:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: a2cd415d9a6fc94c97074ff9d898286e SHA-1: 8381b922555b662f2a0a8ab0891e9795f0c44c17 SHA-256: 748977e1aedd66657038b4197bd3bd855dcfceef6df7b2c686957cf07bbcf4bc

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and "game hack" lures, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to redirect users to potentially malicious content or download sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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/coin-master-hack-ios-2021-game-hack In PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-strategy_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
- https://www.iosas.info/uploaded_files/userfiles/files/coin-master_GM406889139.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_003_off00004b32.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B32	24556 bytes
SHA-256: `f8002b37213a30715ad08e8b3a9786fe1582e8805c9e5e2c9efbf37d98f9b22c`
`font_01_sfnt_off00008352.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8352	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008d3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D3C	18116 bytes
SHA-256: `663054a01704a270a88e5c65db4cbe82af3fd3dd58587b1cb05b092ffe619ba9`

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