Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5430f0414fe465…

MALICIOUS

PDF

47.9 KB Created: 2021-06-04 04:19:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cd8a9cabf7f977f9d09504dea655c819 SHA-1: e57f6bd1dc5c9fd6f0187221348f1fbe207cdefe SHA-256: 5e5430f0414fe465fdc0cdc7238326c10247b3d77c9d3aaf9a05a0886a9d35c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body, though partially corrupted, contains text and URLs consistent with a lure for free in-game currency or cheats. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead the user to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/479516143/minecraft-that-you-can-play-for-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-latest-version_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk-hack-download_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
stream_004_off00005605.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5605 29700 bytes
SHA-256: d08f47ec2955cee54bf4565a7e29a07620a94703c7a6ebb0617ad6196ab451a9
font_01_sfnt_off0000986d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986D 18588 bytes
SHA-256: c2b8d9ff41b5817f39fe12fa9914c2498059949854f0a019c9b111e2507a5aed

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