Malicious PDF — malware analysis report

Static analysis result for SHA-256 15da9a070eb0069b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 10:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d3cf680f2da1dcb6c969b47b0b31e2bd SHA-1: 4882644c3eea0aadd9e8dc0dcef9d452b9f8cce3 SHA-256: 15da9a070eb0069bf53b60520a28ae3508d15caf3b5ecbfd6709373e35b0c751
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures for popular games. The primary link, http://netcdn.tw/app/431946152/robloxmatchcom-free-robux-game-hack, is identified as a malicious redirector. The document body and heuristics confirm the intent to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

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/robloxmatchcom-free-robux-game-hack In PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/aim-bot-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/como-tener-robux-hacks_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/rewards-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/roblox-exploit-download-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/grand-opening-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/free-roblox-codd_GM431946152.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://elearning.man1belitung.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-alts_GM479516143.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_off00002ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED3 22064 bytes
SHA-256: dda11d0edd6edc44429b1f1d61d9e9fe62e1f541a1bf3eb0f518e694ca9248ef
font_01_sfnt_off00005f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F94 19320 bytes
SHA-256: 0d578fc51ad0f188a9c4505a85014dba64e81475c3b1c73d40a415d6db3d1745

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