Malicious PDF — malware analysis report

Static analysis result for SHA-256 8289fd31aae8edd4…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 11:25:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08ebf14fddb755bbfea5e52ee4cb2536 SHA-1: d1b43dc842f6a17fc8d57ec1450eb72b78f6ad62 SHA-256: 8289fd31aae8edd4e3787534fc3026df4c8afb0a4899b0c293eb36de276699fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirector infrastructure, specifically promoting 'free generator' and 'game hack' lures. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely to download further malware or engage in scams. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or scamming attempt.

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/free-robux-website-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-jump-fly-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-ghost-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-script-kill-player-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-jailbreak-hack-exploit-walkspeed-noclip-gravity_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/2021-fe-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-daethrun-hollowenn-update-cheat_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-arsenal-hacks-download_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_off00002fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD4 22864 bytes
SHA-256: d5c6d5b0cec7437978613c6ca60ebb1de3acc942ab09ef29f5957162f8d53398
font_01_sfnt_off0000631f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 19136 bytes
SHA-256: 91d819a85e08464702b4d2399b2944ce52da70a48c8f9d70c1ee064a4c662f69

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