Malicious PDF — malware analysis report

Static analysis result for SHA-256 84708b4936d7bb28…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 07:16:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c7393c84e737261d41c7a41d6b0fe4c5 SHA-1: 331abfb4c10d443da000620a61cb5c1a8668756b SHA-256: 84708b4936d7bb28f3d3a9aac476f75fc3c9a5cd539ef134aba21cd3b42269f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely leading to further compromise. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/coin-master-free-link-today-game-hack In PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/five-roblox-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-piono-hack_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/best-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/roblox-assassin-knife-hack_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/weight-champion-cheat-codee-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/buy-my-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://e-learning20.min2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_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_002_off000034b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B9 22724 bytes
SHA-256: a36ce5c80e0b0fa37b5d0d8d77742bb635ea838e5079fb1b60b8183add6f8adf
font_01_sfnt_off00006794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 18524 bytes
SHA-256: a920f55f025afea5015e120a5f5dfdf37c8d5d267cdc7def099919dbf31b76fa

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