Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8154d9028cb056…

MALICIOUS

PDF

46.1 KB Created: 2021-05-12 00:12:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 87536bd6980a6fbe1e225a0cd9556bcd SHA-1: 17cd5b3deb8aff65a2b6884bb786c5b7570a8ccc SHA-256: cd8154d9028cb0564f544e10faa3fbede6ec6bb912f444d4899d293a659b9fc1
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • 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/free-spins-and-coins-coin-master-2021-link-game-hack PDF link annotation
    • http://www.arichuna.com/images/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/robux-free-c_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_off00004c29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C29 25932 bytes
SHA-256: a880de5f7235c64850e303b6899882f227767af21900748554f3962c016cf733
font_01_sfnt_off00008683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8683 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000906d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906D 18632 bytes
SHA-256: e5cba94a653a55f068ca82f0c7712f51eecd5e3013a204785266329deafd7ed1

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