Malicious PDF — malware analysis report

Static analysis result for SHA-256 30586bf951659213…

MALICIOUS

PDF

44.8 KB Created: 2021-05-11 19:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b959c44fdf8aa08f43b164e05e5ec989 SHA-1: ae4ea54624d9caffcfae445a1ec4f5823e1361a2 SHA-256: 30586bf951659213ee64348d3a2048de43232e23375ced36c1796a5259d2d8a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'Coin Master' game hacks. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, which likely serve as a gateway to malware or phishing content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-free-spins-hack-but-no-surveys-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-in_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-robux-easy_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.

FilenameKindSourceSize
stream_003_off000048bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BB 25004 bytes
SHA-256: e9a0fd7d2f8f89b20b8b3d3e025aea11336603fcb89a28ff46d82baaba41885a
font_01_sfnt_off00008176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8176 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 18708 bytes
SHA-256: e0937bcd33a3b629f0687db8d98eacd8293f1078019919402bc9ac6e2a33e1b3

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