Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16f112b05b45291…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 22:12:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 325b7b850a8a606c3e8bfeec5d5c6f7a SHA-1: 428bcc52a69f1cbcb790a3f94d236950c2e32743 SHA-256: a16f112b05b45291f1d04f2d8dfbad3090cbb7e783b6a40e420cdc20d9365c70
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 0.9796

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.online/app/431946152/i-got-hacked-on-roblox-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pubg-600-uc-free-redeem-code_GM1330123889.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/add-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/demon-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-clothes-on-roblox_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_004_off00005313.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5313 25044 bytes
SHA-256: 67c9334b872c189124fb1c18ad34be4c41c718c8991c36f0061d2e37566168df
font_01_sfnt_off00008cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD7 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off00009d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D15 18460 bytes
SHA-256: a8a49c36ef4b2531a5f792820ad3efe99a39c3e474aae1f279e7d577006455a1

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