Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79bb891a5c7add3…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 23:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 432458729c36d3d706f3fed99dd97b7c SHA-1: 8bb64c6f8f1f2a9f80898f9ed3a5c3a169cb0c9a SHA-256: a79bb891a5c7add3e2c2793d696b24adf07330292b641453b8a6e5fede35cf1e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-get-a-lot-of-robux-game-hack PDF link annotation
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-robux-tv_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-2021-july_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/como-conseguir-robux-gratis-en-roblox-2021-sin-hacks_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/pokemon-go-free-ultra-balls_GM1094591345.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-fast-and-easy-2_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-grnrator-online-no-suveyes_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/roblox-virtual-piano-cheat_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak-beginner_GM431946152.pdfIn PDF document text
    • http://elearningku.mtsn1kuningan.bid/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-roblox_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_off00002f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F53 22472 bytes
SHA-256: ffac2a9b38ae6fae85fe7ffc6f555813ccc9436a7bfdeed3861989f9526fdde2
font_01_sfnt_off00006166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 18820 bytes
SHA-256: cdc6a2a788e7d1c038814bd34757d45de3c8708b5dd2a0e8e1b59012f3bb2d4a

Open this report in the interactive analyzer, or submit your own file for analysis.