Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458fb57cb2dd92f…

MALICIOUS

PDF

37.3 KB Created: 2021-07-06 14:52:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 14aef63fc4668fae51a1b6e57e5bb72a SHA-1: e98587a97d7325fb0402763b19bd3cd505144621 SHA-256: 4458fb57cb2dd92fc305722ca1d12f90377d88600ec65ebf6aaa48465c9d68d3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a primary link to a known malicious redirector. The document body and heuristic firings indicate a lure for "game hacks" or "free generators", suggesting the intent is to redirect users to potentially malicious content or phishing pages. No scripts were extracted, but the extensive link farm and redirector usage strongly suggest a malware distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-admin-hack-game-hack In PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/counter-blox-roblox-offensive-hack-skins_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-ro-ghoul-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-usernames-and-passwords-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-anything-off-the-catalog-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/ultimate-driving-roblox-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-install-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/como-hacer-que-roblox-no-detecte-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/is-it-possible-to-get-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/conor3d-how-to-get-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_off00003ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AC8 22428 bytes
SHA-256: 21868f738bebdb7759839cd5a253c269817465e36e39dd1854d90402f24ee878
font_01_sfnt_off00006c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 19208 bytes
SHA-256: e5ca730804d66bebf4e5e52c5751bcc2b57707170b28c3b0ce40a6afaace4474

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