Malicious PDF — malware analysis report

Static analysis result for SHA-256 b186a640b3b2080d…

MALICIOUS

PDF

31.7 KB Created: 2021-07-20 04:51:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d9c0e1c606ec6e8dec13b20aacf288da SHA-1: 32dcc5d43c411f461d92dddf454654c402fa06ed SHA-256: b186a640b3b2080d566cd7ee0575f052d192e9e3c66ae0675b482c1b62c20a59
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to http://netcdn.tw/app/479516143/free-minecraft-account-and-password-game-hack, which is identified as a malicious redirector. The document body and heuristics indicate a lure for free game hacks or accounts, designed to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/free-minecraft-account-and-password-game-hack In PDF document text
    • https://newenglandafs.com/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://newenglandafs.com/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/free-tiktok-views_GM835599320.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_off000029e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E4 21780 bytes
SHA-256: 09e92d6ab907ec02c82b1e585cac73131b671b4efff18c4db467582c2854684f
font_01_sfnt_off0000599a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599A 18344 bytes
SHA-256: 071cc331fbe0dfc1a6c0e7c1f1383f87707aabc4deba919dc9b38235f2b9b975