Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8a94a8a490ea9a…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 01:12:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c2d3d2c033765dcc002458bb42252693 SHA-1: 3ace51ce3ced54c889b9178f08feda0fa80f7099 SHA-256: 3a8a94a8a490ea9a7dab9d2550e60a69da0e7d633b7e7147a00346b63f65f003
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting potentially harmful websites. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/free-robux-account-giveaway-game-hack In PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/wifi-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/pokemon-go-gameplay-free-online_GM1094591345.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/how-to-avoid-getting-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/who-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-not-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3189 21956 bytes
SHA-256: 6eba5d105d64c19a7e181646e0127b583e294365eeb3f10f9c36c47b621b2cf5
font_01_sfnt_off00006218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 19396 bytes
SHA-256: aeb3a32e0586e0084d16d221114a00023e6aa08da4c2c6f66ed7bfb908e4879f

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