Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd71cfc22dd2d5f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 11:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d43cb21b3ae3a2ad719e5364f28a14d6 SHA-1: 7c4742f624e81090436abbeab9837474ac36a94a SHA-256: efd71cfc22dd2d5fe6c2403e9d3288f9e1559e9cf17c5ccccebfcaf62df6645c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures for free game currency and hacks. The heuristic firings confirm these links are associated with malicious redirectors and game hack lures. While no scripts were extracted, the embedded links and the nature of the lures suggest an attempt to drive users to potentially malicious websites for further exploitation or credential harvesting.

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/funbloxxyz-free-robux-game-hack In PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free4now-info-free-robux_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/roblox-hack-mago_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/robux-hack-sex_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/characters-roblox-free_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/roblox-app-cheat-engine_GM431946152.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://misfi-palangkaraya.com/__statics/gudangsoal/files/roblox-hack-kick-gui-juin-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
font_00_sfnt_off000032a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A5 22460 bytes
SHA-256: c1c048468f10acdc1b1ae9a5622a575bf6dcf1de5501d112a145b93a730a943a
font_01_sfnt_off000064eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EB 19052 bytes
SHA-256: b8da4c12b443ea16a452d57305b0b851670a4d0bed79603d1953fd1acd138761

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