Malicious PDF — malware analysis report

Static analysis result for SHA-256 607bb22d0f3deccd…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 09:26:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: beccfe38853f52a5b071a648784cf97c SHA-1: 40ff91b0f8d2ce7818997944f090da690a9e9130 SHA-256: 607bb22d0f3deccd9753a87b70edbf654c3dbc3d3f596e15ab1df0b2f84d01d3
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a launch action and links to known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The primary URL, http://netcdn.tw/app/479516143/minecraft-116-1-download-game-hack, is presented as a lure for game-related downloads. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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/479516143/minecraft-116-1-download-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/launch-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/good-roblox-games-about-cities-for-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/griffin-hat-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-followers-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-without-survey_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-put-music-into-any-roblox-game-hacks_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-on-tablet-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-apk-android-download_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_off00003287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3287 22156 bytes
SHA-256: 719749f825468070b2ee23dc980ad742d90a03d560d3e8f103e09331054c3be9
font_01_sfnt_off00006349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 18852 bytes
SHA-256: 4483e5b1b16afe4ffd26e41fedb821033deb29291bc0e6ac11589c4da06d798a

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