Malicious PDF — malware analysis report

Static analysis result for SHA-256 7620c079e4c6437c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 13:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 53aca84a8cba295428bf8d044f16a2fa SHA-1: 3ceb7a685d25ae90b46f41b33169de4bc911f8bf SHA-256: 7620c079e4c6437c15d2a09983e9fef175d0a3a2d82d2900518898555f6dbc21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items or hacks. The primary link, http://netcdn.tw/app/406889139/free-coins-for-flip-master-game-hack, is identified as a malicious redirector. The document's structure and content suggest it is designed to trick users into downloading further malware or visiting compromised sites.

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-coins-for-flip-master-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-girl-account-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-link-today-facebook_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_off0000310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310C 22748 bytes
SHA-256: ca2dce0b0de334e06ed19ca52d0342957da3ebcfa8859ca156ed0ef14afa8de9
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 18248 bytes
SHA-256: 15af221dd5c3311a73758cd56b9e13e8fd3ef2e59b1801455b5f1f458413cd9b

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