Malicious PDF — malware analysis report

Static analysis result for SHA-256 a230644b75462fb0…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 19:31:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ba083a2970a3bcbd43d3d8a00990b060 SHA-1: 764a0e0bb0c6d0874d9f00a6463ab80e68d86d63 SHA-256: a230644b75462fb0274de8580ff731a2349ac6b272f3ed5c14f37e0601fa8a5d
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 0.9971

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 https://netcdn.xyz/app/406889139/easy-free-spins-coin-master-game-hack PDF link annotation
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/mcpe-116_GM479516143.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-attack-block-hack_GM406889139.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_003_off00004b5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5C 26360 bytes
SHA-256: 1b5023fc4787011f34c5e4dbb22f9432b48096bf2ebfad43232abce2711cbca2
font_01_sfnt_off00008695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8695 18068 bytes
SHA-256: 2b5bcb60036e8604cee537a76a0c1d845177aa2c28f1eb7ce8b27015c89bb61f

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