Malicious PDF — malware analysis report

Static analysis result for SHA-256 900ba4f8448d3ce7…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 03:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6eee786aec07a915babac45dc09c8a73 SHA-1: 98c4db98c769d1135369a4134f1ce2f221d45f83 SHA-256: 900ba4f8448d3ce7f2dfc3b1d3bc50038a533ff104f0b895062a49bdf3057ec6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9969

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/431946152/free-robux-no-verification-or-survey-2021-game-hack PDF link annotation
    • http://taskcyg.nl/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/roblox-rape_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/level-coin_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000490a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490A 26436 bytes
SHA-256: 644c52b210c4ad6ad21b9eebffb9be0a2e04c65f7f48f4f245f0fba321d9ef07
font_01_sfnt_off000083c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C8 19296 bytes
SHA-256: 8ae3a64377bb3499e06ef2dc6ba5ce98d8bac2a4cf46517fa6b68a3eec67b541

Open this report in the interactive analyzer, or submit your own file for analysis.