Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d93d2aedf0f1f2…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 23:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 882b9cb2044610668096bed1527f0b9d SHA-1: 3febf31578aaac3435a173e23f96b849996a7c4a SHA-256: a4d93d2aedf0f1f27051984f11f396b0f8394b4bbfa6740a51b4a4a5679d4939
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous embedded URLs and a prominent external URI pointing to websites that promise game hacks, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to deceive users into visiting potentially harmful sites. No scripts were extracted, but the presence of multiple game-related lure URLs suggests a social engineering tactic.

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/431946152/how-to-hack-into-someones-roblox-account-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hacks-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-hack-super-jump-on-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-roblox-booga-booga-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-hack-apk_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-without-email_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_off00003137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3137 21796 bytes
SHA-256: e5c7a0108a58fd1eec6b1ec99845bf6f2f6a04cb615f51c61123a74362e1e00e
font_01_sfnt_off00006110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 19324 bytes
SHA-256: 24cbb78c2e4d02f15d6dff94c04074d97d349401c8d74d3264b26149d869587d

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