Malicious PDF — malware analysis report

Static analysis result for SHA-256 323d486ae78574e4…

MALICIOUS

PDF

45.1 KB Created: 2021-05-18 00:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bdd9a95bd75cdae4856dc82f990f1a92 SHA-1: af6bf0e54be05c6909477bcb640378a5cef55cb1 SHA-256: 323d486ae78574e4aead9289f670a34790630aed01aab4988179e80517f88352
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a fake CAPTCHA lure to entice users into clicking malicious links, specifically targeting those seeking game hacks or generators. The primary link directs to a known malicious redirector infrastructure, which in turn hosts numerous other PDF files with similar lure themes. The document body contains obfuscated text and multiple URLs, reinforcing the phishing and redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/coin-master-unlimited-spins-game-hack In PDF document text
    • http://ggmtc.net/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-coins-coin-master-daily_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_003_off0000490c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490C 25156 bytes
SHA-256: eb9a759c7ad4eac9daf0618091b42e246154f21be824a7b9c88fecebe07de82e
font_01_sfnt_off00008354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8354 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3E 18416 bytes
SHA-256: 2819b97f5983e3f22772fe648ff6c71d7ba3247a5cdc01de3c66e535b1fe6453

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