Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48d42e81cc4b0ae…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 00:26:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ff13a83b9731286aee4e278e42e45684 SHA-1: 1e360b5f132927c7747429220bcee7a337140973 SHA-256: d48d42e81cc4b0aed6e21a5bfb6b3a572eb8afac5ad39904775cd0a09e1ba8f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/make-free-robux-game-hack. This redirector likely serves as a lure for game-related cheats or currency, aiming to exploit user interest. The presence of a visual download button and the ML classifier's high confidence score further support the malicious nature of this document, suggesting it's designed to lead users to potentially harmful content or further stages of infection.

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.co/app/431946152/make-free-robux-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pubg-uc-murah_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-gear-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pokemon-go-free-quest_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-giveiaway-live_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pubg-mobile-uc-2021_GM1330123889.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_off00002d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D40 22312 bytes
SHA-256: b47731037543930ac4ddebe3c0c651656fc15f37607ed14002f9cee1b5b3b8d0
font_01_sfnt_off00005f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 19084 bytes
SHA-256: 480c89487a14742f7141225872d5c58d3fe4f75b5aa5747387f60334adf20675

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