Malicious PDF — malware analysis report

Static analysis result for SHA-256 9043e61c8ae5f864…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 11:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2833bf4fb727e1a655759f2456e6de41 SHA-1: a01526e7c7d14916c923ec5f68fc81cbe8650ad7 SHA-256: 9043e61c8ae5f864d6ceb3df5884faf8ff48fca99bb4bab4cfad2445483892ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that lead to a known malicious redirector. The document body and heuristics indicate a lure for game hacks and free items, designed to entice users to click the malicious link. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-spins-and-coins-for-coin-master-game-hack, which is part of a known malicious redirector infrastructure.

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/free-spins-and-coins-for-coin-master-game-hack In PDF document text
    • https://globair.com.tw/image/data/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/roblox-free-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/free-roblox-accounts-bugmenot_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/are-there-any-free-my-hero-academia-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/free-robux-hack-an-orator-club_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://globair.com.tw/image/data/files/free-draw-roblox_GM431946152.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_off000030df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DF 22452 bytes
SHA-256: d38c4f9765d96477c46c33d7b20f90977d98e770798b41d3c35f224ceba9c624
font_01_sfnt_off000062cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD 18348 bytes
SHA-256: e3514f5c13c59f74fe131b320bb4a7a21799b0fccf5b53c141d50f68870e844d

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