Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b03e350696d119…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 19:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4446a56a1b82c342180ec943445cc693 SHA-1: 6a1411fec73e4b3000c39f9976b3c8755d31adaf SHA-256: 61b03e350696d119f759fcf389c50441ee9320b120c86e55a4f6c259ca76a139
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency ('Robux') and links to a known malicious redirector. The document body and heuristics indicate a social engineering tactic to drive users to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/get-free-robux-no-verification-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-et-free-robux-april-2021-pc_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacked-roblox-hats_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-no-test-or-dowmload_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-do-you-get-free-robux-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-how-to-hack-gears-online-rpg_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/bux-blast-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/best-roblox-scripts-free_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/omnija-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-roblox-for-admin-commands_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/robux-hack-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-domino-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-lua-scripts-cheat-engine_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
font_00_sfnt_off00002fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 22124 bytes
SHA-256: a076505a5e0c6dfe06a349225271eedf73adad772f170ebd652f1b32446520be
font_01_sfnt_off000060e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E3 19072 bytes
SHA-256: e72ada6374821b36eed7d40ca7e66d9301b0fa24814d932b66fe4108e9a41cd9

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