Malicious PDF — malware analysis report

Static analysis result for SHA-256 4482de237d561b4a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 14:07:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 183803ea4c5ca66b96be1cca7ff51fda SHA-1: 5e033d46582b0808696d792da22be70b698d2459 SHA-256: 4482de237d561b4a567105d02eb887a5b12f3c50ea33668108f4607555fcb529
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux' and game hacks. The document body and heuristics confirm the intent is to lure users to a malicious URL. While no scripts were extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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/free-robux-2021-no-human-verification-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-comcom_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/tiktok-free-view-github_GM835599320.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-hacks-tower-of-hell_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-without-verification-2021_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
font_00_sfnt_off00003070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3070 22104 bytes
SHA-256: 7b5daf5ffdee936833d3b0a489691d82b7f18e598d23983ff500aa848554088a
font_01_sfnt_off0000614d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 19736 bytes
SHA-256: 415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25

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