Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3dcbd226d5b3b8…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 22:02:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 818b0a870cfd8b97eb83af6dcefe207b SHA-1: 209a658e73ec878cf0fd949420f2e86d3d4b7ff8 SHA-256: 1f3dcbd226d5b3b8d0a161587d4ee30287640974f544a773ecbeafeca9b6f00d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a document body that explicitly advertises 'How To Hack Robux' and related scams. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous suspicious URLs indicates a high likelihood of a phishing or scam attempt. No scripts were extracted, but the document's content and embedded URIs strongly suggest it's a lure for a malicious website.

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/how-to-hack-robux-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-that-i-can-play-for-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-unblocked-hacked_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-codes-2021-no-human-verifivation_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/cheat-argent-sur-roblox-vhicule-simulator_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/codes-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-hack-robux-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/beyond-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/hack-skin-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-phantom-forces-hack-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/catalog-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-game_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/apocalypse-rising-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-minecraft-hosting_GM479516143.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_off000031a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A2 22060 bytes
SHA-256: ffd4c0cb28cf077e23aad5f8158f0db19f687b53f8376b5039fc0bab92f7f7cd
font_01_sfnt_off00006292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6292 18884 bytes
SHA-256: eabb09a914750731f64ad11a0b688188fe1798403d7ade495959fd69a4976413

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