Malicious PDF — malware analysis report

Static analysis result for SHA-256 403866209589c2d1…

MALICIOUS

PDF

35.1 KB Created: 2021-06-28 13:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 477c46b29454412825e5a41d910dfb96 SHA-1: 859f95512994798ce3429cfe34e2f713ebc4a87c SHA-256: 403866209589c2d16acd03b635cc0c1eff10da66bd3fa3c5f55270cae4d9317e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded URLs suggest a phishing attempt to trick users into downloading potentially malicious content or visiting further compromised sites. The ML classifier also strongly indicated maliciousness.

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/change-roblox-username-for-free-android-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-roblox-with-nopde-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-aim-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/easy-roblox-today-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-mod-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-a-roblox-account-password-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/future-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-hack-no-app-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-how-to-open-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hacks-for-roblox-mac-that-works-with-overdrive_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-win-free-robux_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_off000030f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F9 22536 bytes
SHA-256: a05358d7ef4c769d06b0c3739987742bd45a4d342f7bd8912c08da749f9e3c63
font_01_sfnt_off00006353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 19372 bytes
SHA-256: 957c2a012c75958bd4d83db002d697d11491803d5f7ab63ebd599e6aa27eaf07