Malicious PDF — malware analysis report

Static analysis result for SHA-256 456c7f32fc065828…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 12:42:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c731a2ea10175ea05e52afca4a63f117 SHA-1: 04f41852425be5b8eceab08acc73b22ea9b942f5 SHA-256: 456c7f32fc065828275640fa739d47d66e35099d2c94d151c3ae252cc05833ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to a known malicious redirector, masquerading as a 'Coin Master Free Spin' generator. The ML classifier strongly flagged this PDF as malicious. The primary lure is a link to a redirector that likely serves further malicious content or phishing pages.

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-spin-and-trading-game-hack In PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-robux-bc_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-credit-card-for-robux_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/pubg-uc-mtc_GM1330123889.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/wurst-115_GM479516143.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/admin-roblox-games-free-robux_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/business-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-free-robux-d_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-spin-card-exchange-coin-master_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_off00003158.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3158 22780 bytes
SHA-256: 55f395d2f20da453a65304e00d1e9b92e28a615db6e662731b23f4aaea7bd2ba
font_01_sfnt_off00006470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6470 18348 bytes
SHA-256: 3321b442349ec3fbeffa6c99ea757bca325654330b1776a80a606c1f7099e679

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