Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bba9d0f456576c2…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 17:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b758adcc16ef021f48227291500b92cb SHA-1: afe55699df4f5201f103064e2b7aecd51c217f95 SHA-256: 4bba9d0f456576c2557455f03c881855f900add9d5f575314732de4ddb10b2d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks and generators. The document body and embedded URLs point to a primary redirector URL that likely leads to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-change-your-username-on-roblox-for-free-2021-game-hack In PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/views-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/roblox-cheat-engine-bypass-v3rmillion_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/getfree-robux-eus_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/roblox-ultimate-driving-westover-islands-money-hack_GM431946152.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
font_00_sfnt_off00003431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3431 22544 bytes
SHA-256: 2792dd9887a5bfc14cafacd95c9727011ae7d78702382042b2664c25e0b4a11a
font_01_sfnt_off00006682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 19944 bytes
SHA-256: 941d7874c20e01d2e3c218a6689e46eb54611adc3eaa4e174989dc6aeaced13a

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