Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27654105de960cc…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 23:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a7f74fa9e3dc7c5908b5b5ec537c6edf SHA-1: d46d281bc16f0544a7a9a4c150f0b2ba839f109a SHA-256: f27654105de960ccfdeccbd15d75cc74fa756362711212d43907691ddcf54706
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, which is designed to lure users into downloading potentially harmful content. The document body and heuristics indicate a 'game hack generator' lure, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

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/479516143/how-to-download-minecraft-hacks-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-and-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/fast-hacks-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-accessories-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-online-games-like-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/cheat-apocalypse-rising-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-reedeem-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/money-hack-roblox-adopt-me-2021-july_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-cheat-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-roblox-accounts-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-without-verification_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
font_00_sfnt_off00003558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3558 22148 bytes
SHA-256: 2db5269c1020cb7d570a42a46eee8982f7d8631d38f981b28fbbe8e7b2b005c5
font_01_sfnt_off0000660f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660F 18748 bytes
SHA-256: d3c6952994d6e24d3bacf5184ddbc3a45400015c11867e6fcafaa525ffd68a7f

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