Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e20059588b2f220…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 10:17:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 09958fa05a3d6493591fcb4aeb70d516 SHA-1: 0315206ad51be7d03a48883b7d3fd1e5715f50a4 SHA-256: 3e20059588b2f2205563bb828a20602f3eab48d8d261a7de880169547106e003
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and text promoting free game items and hacks, specifically for Roblox and Coin Master. These links direct to a known malicious redirector infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence.

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/free-roblox-accounts-with-robux-that-work-not-banned-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/sites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-ticks-and-robux-no-scamn-idiiotr-rwetfr3eytegr-tgre-ee354_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/pubg-uc-u-mobile_GM1330123889.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/for-free-robux-on-roblox-com-free4mobile24-com_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-how-to-get-japan-sushi-card-free_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
font_00_sfnt_off000031ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EE 22972 bytes
SHA-256: c5b6b84467e07a1b9db921d6f9281821567f7e508ac35e91fba6a80bbd9690f3
font_01_sfnt_off000065c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C3 19720 bytes
SHA-256: e7aa0a474f873a6e751f5083720d35e515444fa97241f03d9058db0775c81672

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