Malicious PDF — malware analysis report

Static analysis result for SHA-256 178f91b68d849a3a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 23:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d6e62660458f09372ec99778a36b513e SHA-1: 1d34a331b56ca6e42d02d65a5483bb9f1cfa9b85 SHA-256: 178f91b68d849a3a56f4071792c75c78b198274dd7f848ef18930ef022ebba34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to a known malicious redirector. The document body and heuristic firings indicate a lure for game-related cheats or currency, designed to trick users into visiting the malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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/free-spins-and-coins-for-coin-master-game-hack In PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/roblox-hack-tool-without-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/pastebin-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/hack-configuration-roblox-robuxian_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/roblox-groups-that-give-you-free-clothes_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/free-robux-hack-that-works_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-app-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
font_00_sfnt_off000033b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B3 22768 bytes
SHA-256: 841782e18c9dbdf79339ec45315dc5ee23242845586bda6eb18c8d04f7463e64
font_01_sfnt_off000066b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 18348 bytes
SHA-256: e3514f5c13c59f74fe131b320bb4a7a21799b0fccf5b53c141d50f68870e844d

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