Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0dd928b0069c6d…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 20:54:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 79b20f4ec8be700ca6b32d575b06d21d SHA-1: afe0b1a3cdca48a3afb4707d71ff53516c082aa9 SHA-256: 9b0dd928b0069c6d23a49032026d524dbfb78f7aff6b3798f7bfacaaea2429d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, disguised as free game hacks and upgrades for popular games like Roblox and Coin Master. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-t-shirt-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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/roblox-t-shirt-free-game-hack In PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/pokemon-go-free-upgrade_GM1094591345.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-free-robux-2021-envix_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-admin-roblox-download_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/tears-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/chrome-shortcut-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-ninja-animation-hack_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-javascript-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-script-exploit-to-use-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-galleons-hack_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_off000030dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DD 22392 bytes
SHA-256: 5800a18efe86db75ea6bbd04aa643ef634322f3db1f96f1bed07774d3f796080
font_01_sfnt_off000062b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 19040 bytes
SHA-256: 83c55651de22b82eb0e9cdd22ec7f0f9dcbcccf384ff8c2b36078679603d7ff3

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