Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e62904079771ed…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 09:46:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ead5ce280d930aa1608f4a879da92abb SHA-1: 87981fd840eeda0931ef100d462c52b340b305b8 SHA-256: b8e62904079771edbecb15c2561dea8dd553fd3fd7f479b0841e0264229259f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack'. The ML classifier also flagged this PDF as malicious. The presence of these links and the lure suggest an attempt to direct users to a site that likely hosts further malicious content or exploits. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or redirection attack.

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/835599320/tiktok-free-make-your-day-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-free-tiktok-followers-no-verification_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-we-get-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_off00004fa9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA9 24480 bytes
SHA-256: 469cd2c19c50a8dadc103787dc37efb9b383b823a6fad4d8fef3fa151680db57
font_01_sfnt_off000087f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F0 18528 bytes
SHA-256: 67b809c207607d6439d1a518e247a7a895c07440011190806ed16e112dd7bea8

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