Malicious PDF — malware analysis report

Static analysis result for SHA-256 579fe5ee36d988ef…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 15:11:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9440081c4fc4ec9d5818196f93817301 SHA-1: 54bf12c5c9f0be40cd7d69ccceb561d911712ae0 SHA-256: 579fe5ee36d988ef9594393aab518d4052e76da7b3ac4774991453ffc9d63bba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs that redirect to a site offering 'free spins' and 'game hacks' for popular mobile games like Coin Master and Roblox. This is a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks, indicating a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-1-coin-master-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/10-tips-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-animation-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-versus-pc_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/change-this-setting-to-get-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/money-money-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-robux-hack-top_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/tiktok-for-free-install_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-scripts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-gift-card-no-scam_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_002_off00002f68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F68 23132 bytes
SHA-256: 271d55c3c0799dc6cda972053040397dd4c335d9c191a49bb6db092035f5502b
font_01_sfnt_off000063b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 18280 bytes
SHA-256: c6e059c9ed721b3913b3564b37d12693d805a011019115ba3458bc9a4db4920e

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