Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a29a6b901a60f07…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 05:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 855823da99260477dc8d4eab44daef9b SHA-1: c402220081d29f9b022f1a4e2d3221bf47e6f80c SHA-256: 4a29a6b901a60f07dbbf647f170eb4679ac243844b69e251eb0906209bc41748
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, masquerading as a 'free generator' or 'game hack' lure. The primary link directs users to https://netcdn.tw/app/431946152/paginas-que-dan-robux-free-game-hack, which likely serves as a gateway to further malicious content or downloads. The presence of embedded URLs and the ML classifier's high confidence score indicate a deliberate malicious intent to lure users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/paginas-que-dan-robux-free-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hack-any-roblox-account-using-a-program_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-tiktok-followers-zonder-verification_GM835599320.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-hack-us_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
stream_004_off0000505b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505B 24784 bytes
SHA-256: 1c4b461002b96dca8623647a5fe4bd46356d56fb9958133b851349bd22a3acd4
font_01_sfnt_off00008952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8952 19128 bytes
SHA-256: d5dd61abc9bd0ed23908318ca1d226a32de56482a48644ec980b0257704c5a57

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