Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd134210f48248c…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 12:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dba609443af94a262c6263a5ef4ed26f SHA-1: f408dfe1678de4853ed26d2d2deba3605f66e498 SHA-256: efd134210f48248c6a693c8a45a927e1f339aa7bbfec611c32c8384a405d1516
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to entice users. It contains multiple embedded URLs that redirect to known malicious infrastructure, likely serving as a phishing or malware distribution vector. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

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/hacks-for-games-roblox-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-adder_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/pubg-40-uc_GM1330123889.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-legends-of-speed-race-cheats_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-do-u-use-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/https-free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/wahoo-gaming-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://collectrobuxIn 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
stream_004_off0000504b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504B 25532 bytes
SHA-256: 24981e5ae8add6c44af88916c2a81aceab48f9c8b844bbd36db0eeb8692b4c2e
font_01_sfnt_off00008b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B24 19260 bytes
SHA-256: 0e9b15a13ca27a232610f713bb60651ad2ff71c15d8a54b40594f949e01a0607

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