Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6f9ae4745d62a8…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 11:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e0f191805552e19bd8e2a5e3202cb328 SHA-1: 6aada53c467de155a84ac4dcedc55791798b32ab SHA-256: 3b6f9ae4745d62a82f3ce975f49db2389a07d709020185d5e379ee74a7c41d34
160 Risk Score

Malware Insights

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

The PDF document employs a lure related to "free Robux generators" and "game hacks" to entice users. It contains multiple embedded links, with the primary one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-generator-no-human-verification-2021-game-hack In PDF document text
    • https://www.imagevideo.info/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/is-it-possible-to-hack-coin-master_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D1 24312 bytes
SHA-256: 9015e685a97f230ac0ff17f25370fe3bc652d8339325503c7419fcd154973713
font_01_sfnt_off00008050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8050 19260 bytes
SHA-256: cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4

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