Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d058fbde07cf19f…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 02:52:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b5c4f0dc809f337bc249b389b2321171 SHA-1: ad3ec08e33de2c0c12c3ad16081aabe9c63909ca SHA-256: 1d058fbde07cf19f80b914c9b4668b3b1946bd1f3e12e3ce4e9c9b545c470f69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack'. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful websites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/60-free-spins-coin-master-game-hack In PDF document text
    • http://library.umla.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/games-that-give-free-robux_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_004_off00004fca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCA 26232 bytes
SHA-256: e1bb74bfc4dfe3ad97b8dfb3e8a8ec03be6a7b8f31574a9d8776b8d1ba2086c3
font_01_sfnt_off00008c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0F 18224 bytes
SHA-256: c1ecca62003467cdf8c5fbac224d7e39febf20c3e1f0cb28698ef381036d4826

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