Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b795cf5e86aed8…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 09:25:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0526ff6dee8fa08066a03a81e6a815c4 SHA-1: 2b8074bcea3b178d247b378f744b69c2572e6de6 SHA-256: f6b795cf5e86aed84fb88788e78ab823e9cb2b52473e3ac743bdae0d84f6c712
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 primary malicious link identified is https://netcdn.tw/app/431946152/roblox-get-free-robux-2021-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-get-free-robux-2021-game-hack In PDF document text
    • http://library.fisip.upnvj.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-roblox-booga-booga-on-mac_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-account-roblox-2021_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
stream_004_off0000530f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x530F 26424 bytes
SHA-256: dbc94e44598d332874513a4d803b3a4dee33e95944db12bc1d85685105468bc8
font_01_sfnt_off00008f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F34 18596 bytes
SHA-256: 2e89b69136d90bc8fba69b0cfb2394799520d2b9afb16672bc8315f7af41a68e

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