Malicious PDF — malware analysis report

Static analysis result for SHA-256 af57670e03f6e307…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 10:21:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a1442c02efee6f417aa742e80fe6958 SHA-1: 0984bec3d2e238529f4ccf9cbf735ddd6c6b0b56 SHA-256: af57670e03f6e307f0041c2082fad933cc0ff02cbe839a991d20ef3c64816c4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators" for popular games. The primary lure URL is https://netcdn.tw/app/431946152/hack-roblox-accounts-passwords-game-hack. While no scripts were extracted, the embedded links and the heuristic firings strongly indicate a social engineering attempt to direct users to potentially harmful content or further malware downloads. The document body, though partially corrupted, contains similar lure text and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/hack-roblox-accounts-passwords-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-robux-no-verification_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
font_00_sfnt_off000050d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D5 26128 bytes
SHA-256: a7b3d0d4fc0f8b60c5d9a502aac9b668d073423766486da10c43f0b4f07af6fb
font_01_sfnt_off00008d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D14 18916 bytes
SHA-256: 79cb5e6467f85a164be00b57da8db6aacff00b51ef509f68e216f29e28339fd8

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