Malicious PDF — malware analysis report

Static analysis result for SHA-256 86339ca7aae0862e…

MALICIOUS

PDF

45.9 KB Created: 2021-06-09 09:02:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6acbb21e1331724267ce011d7e76e022 SHA-1: 90ab4496fb9440ddbabe54fb20aeffe906f3f476 SHA-256: 86339ca7aae0862e158d5f376825c6f5bd6448f940251383583a8601c675c9d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hack generators and free spin offers. The ML classifier strongly indicated maliciousness, and the document body contains obfuscated text and URLs pointing to potentially harmful content. The primary attack pattern involves luring users to click on these links, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-codes-cheats-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/tiktok-free-gas_GM835599320.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/inf-health-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E8 26792 bytes
SHA-256: 1c3a6bd65f524eca3510857c35f99e47925f389b33ab222800eea5d54fc04014
font_01_sfnt_off0000900d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900D 18456 bytes
SHA-256: a53a4d2d3dc45cc2d11ac454615993ab50d8cce723efab577de5644cfc19f8ad

Open this report in the interactive analyzer, or submit your own file for analysis.