Malicious PDF — malware analysis report

Static analysis result for SHA-256 4492cb9d958d08d1…

MALICIOUS

PDF

49.5 KB Created: 2021-06-08 00:34:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dfcb212c3ca126319805fc815d40780c SHA-1: 6038e3faca6db2bc9d9d4b39015682c09e91deaf SHA-256: 4492cb9d958d08d163d305b58bfa52ea159aaf410cc9d471c180f3838b6c81c5
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 0.9796

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.tw/app/431946152/free-robux-hack-no-apps-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/i-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/robux-free-100-real_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000518f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518F 29864 bytes
SHA-256: e91cd9334e03783ed18200650290101cf3bbb5c3eef11a449b77e70601fd9712
font_01_sfnt_off00009425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9425 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00009de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE1 18588 bytes
SHA-256: c2c9e2a8e4d0fd52350d0629f0823886694f0646d013af100cf34a24a3b1f69d

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