Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a54bdd70679883…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 13:07:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7d293a23bcaf947d662aaea12cd07dd5 SHA-1: df1b5caa457540a2ad0c32214133a360abf84dd0 SHA-256: 89a54bdd70679883abd035f23eb98b0b1e6c40106f50b74a7bbfc0f6404f266c
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free Robux or game hacks. The ML classifier also flagged this PDF with high confidence. The document body and heuristics indicate a lure for users to click on these links, which likely leads to the download or execution of further malicious content.

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-no-survey-or-human-verification-game-hack In PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/free-roblox-cape_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/roblox-grand-crossing-roleplay-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/robux-800-fre_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/free-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/free-robux-jesse-tc_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/free-robux-redeem-card-pins_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-promo-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://e-learning.man2balam.sch.id/__statics/gudangsoal/files/synapse-roblox-free_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_off0000322c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322C 22324 bytes
SHA-256: 0a47a331e83feecaa783679fccfeff9c6e1f92497671323858601a612b9fe371
font_01_sfnt_off000063d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 19628 bytes
SHA-256: cdea958d27f31e1bb93a151c26d135a3dbedf9ed5520af1903eb9fa34a77bfdd

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