Malicious PDF — malware analysis report

Static analysis result for SHA-256 1492aee79afd65e2…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 06:13:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e6da67293b8fdf74634b2ec481cc30ce SHA-1: 33610e2fd00a1872275dde80f9cfea5b2e1b0dca SHA-256: 1492aee79afd65e28c223b8123bd3041625929907bfac4e621f99a5c1cf33f88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'free spins' and 'hacks' for popular games like Coin Master and Roblox. The primary lure URL, http://netcdn.tw/app/406889139/100-free-spins-for-coin-master-2021-game-hack, is flagged as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at tricking users into visiting malicious sites, likely to download further malware or harvest credentials.

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/406889139/100-free-spins-for-coin-master-2021-game-hack In PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/get-500-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/speed-hacks-on-fangs-roblox_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/pubg-uc-logo_GM1330123889.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/cerberus-hack-roblox_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/in-roblox-field-of-battle-how-do-you-hack_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-roblox-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack-without-human-verification-india_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_off000030b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B1 21992 bytes
SHA-256: b8370f0465e8d1ecdf40eda8da3992e1a7ff6332375207e39e58249bcbfccb83
font_01_sfnt_off00006163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6163 18576 bytes
SHA-256: a7425c34b8d7eb14cbf0da848baf8ea5686f32b078cb66a28ba99e388d73710a