Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d627284ee1d6a9d…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 22:55:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 16c703d761d30067084446ecddd0d9eb SHA-1: 2656200fd0ac2eb3cd7e91832e26617b5b255a38 SHA-256: 5d627284ee1d6a9d862f003ad5f6fb1e9b5882087c929f6450ddb0235e0c6bfd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' lures. These links ultimately point to other PDFs hosted on suspicious domains, suggesting a multi-stage lure campaign. The ML classifier strongly indicated maliciousness, and the document body confirms the deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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/show-me-how-to-get-free-robux-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-hack-on-tablet_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/pokemon-go-free-602_GM1094591345.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-phantom-forces-hack-credits_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/mais-backpack-free-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-piano-player-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-robux-games-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-likes-and-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-how-to-get-a-free-dominus-hat-2021-australia_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-for-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-minecraft-premium-account_GM479516143.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_off00003147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3147 22548 bytes
SHA-256: 2b5875591894acc0dede022d324945150ef208b1d40d74d94ce2038b88271332
font_01_sfnt_off00006343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 19348 bytes
SHA-256: d26d04a97ef4ef1984db51a9dbb6ae7fe4887511724be7c0a10401d3a20c9a41