Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8caf7cf469da9c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-11 18:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 367b7987573d459a1a31365bbeab25fd SHA-1: c82e8b16223c29136291fa6f8f794f1006086ed7 SHA-256: 4b8caf7cf469da9c53ee2e5c8f208056060ecc82006e569c211835baa891d9cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and currency. The primary lure is a 'free generator / game hack' promising Robux, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/how-to-get-1-million-robux-for-free-2021-game-hack In PDF document text
    • http://glll.de/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://glll.de/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://glll.de/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://glll.de/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://glll.de/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://glll.de/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://glll.de/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://glll.de/images/roblox-download_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://glll.de/images/demon-roblox_GM431946152.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_off00004660.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4660 24972 bytes
SHA-256: df1f32b44bfb1a1ea1fdf27b2e6e8adca9f462a8c41abbe12570609432872e47
font_01_sfnt_off0000801b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801B 19072 bytes
SHA-256: 6899649986c08cd88da4e8ab8a55ee52e34bf21c69bba097983649bb28a6798f

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