Malicious PDF — malware analysis report

Static analysis result for SHA-256 b784e81c506dc69d…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 11:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e5e38b8f6ff1a858030a14c9b3bfe4d SHA-1: 93a27314a41f10fb2795a23aab1a7d7213d64554 SHA-256: b784e81c506dc69da4d8d44ebe38640b3f3b6d897b32cdf28a95a76ed77a0a0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these 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.tw/app/431946152/robux-hack-no-human-verification-game-hack In PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/how-to-get-free-robux-2021-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.rajawali.ac.id/senayan8/repository/boys-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3263 22216 bytes
SHA-256: 429950e7bb82509fb58fa2aefcdf86a2849a63d6ed315ef5c16cf18320c2743c
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 19340 bytes
SHA-256: 41a0e445dd5cfc8127d469b764e5159eb585ff2b04ca03f6aaed2423ada6c669

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