Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa004af1381f2c1…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 18:04:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a3e0ddbb7daaea67f990b9d5921944b SHA-1: a9a57c215f71f45e42d5206b33dd5f8ae2dc1ead SHA-256: 3fa004af1381f2c14d00f3d9efef2e86a016aa6fbc9c5fff5a320c13bd094ffa
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/479516143/toolbox-for-mcpe-game-hack, which is presented as a 'game hack' generator. This lure, combined with the visual download button heuristic, suggests a social engineering tactic to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/479516143/toolbox-for-mcpe-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-hack-may-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-cheat-codes-for-money-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/cheat-engine-roblox-money_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/pubg-uc-giveaway_GM1330123889.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-codes-live-stream-november-22-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-apple_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-robux-banana-website_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-groups-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-card-codes-deutsche_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-hack-no-scam_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-roblox-animation-codes_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hurt-roblox-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-speed-hack-in-swordburst-2-in-roblox_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_off00002f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0B 21740 bytes
SHA-256: 7ab8f7281c229d608d19c7854d465a9cd8d19cf7b378a4fe5be8caf27d7feddc
font_01_sfnt_off00005ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA3 18392 bytes
SHA-256: 6731796fcc3540c9bce8cf4082208439aef10811acb01390060e5f462b6e1492

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