Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a77aef421740ed…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 14:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 952f87a1f0412463981c2f82b54ba5e3 SHA-1: 6cce0229a203fbe89146affa7169a0a99c14ed31 SHA-256: 46a77aef421740ed5db0ef020939becd4c5dc2cb5033e496dd56fc7974813318
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to trick users into clicking on links that promise game hacks or generators. These links lead to a large collection of other PDF documents, forming a link farm. The primary goal appears to be SEO manipulation or directing users to potentially malicious content hosted on external domains. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/spin-link-game-hack PDF link annotation
    • http://uctaren.eu/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/coin-spin_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uctaren.eu/images/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://uctaren.eu/images/coinmaster-rewards_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.

FilenameKindSourceSize
stream_003_off000047dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DD 25616 bytes
SHA-256: aec79b976bac2dff17239191fa0faa718b640f7887adb118e77b93daeb7e7ceb
font_01_sfnt_off00008253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7C 17420 bytes
SHA-256: c61b493abd50a1b6cbb3c364df034310bb1eafa496f87ac3d197ad8d6a3a520f

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