Malicious PDF — malware analysis report

Static analysis result for SHA-256 882a52265e4bd7f7…

MALICIOUS

PDF

45.2 KB Created: 2021-06-04 01:53:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7557f82a0e2ef3d449d438a63f8f547f SHA-1: 015c907a0afeddb66e79ec0994169a8182a24540 SHA-256: 882a52265e4bd7f74b7061ccb58f628974c9cddddebecccfd4c450830cd5df9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game-related lures, such as 'free Robux' and 'game hacks'. The document body and embedded links strongly suggest a social engineering attempt to trick users into visiting malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.online/app/431946152/how-to-get-free-robux-instantly-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-get-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/which-pubg-uc-is-best_GM1330123889.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coins-on-coin-master_GM406889139.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_off00004f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F01 27188 bytes
SHA-256: cbf004bffab0d645ca2030058a40c6d30e8a4642aa16519a4cd16759b653b4f1
font_01_sfnt_off00008c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9E 18764 bytes
SHA-256: 19eb0a1aeef998e7db468722215b94b9b4bc3d0fba007f3cca2c49ee7cc94cee

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