Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8ca8a9869611e1…

MALICIOUS

PDF

51.5 KB Created: 2021-06-04 02:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6da85672c0fa8aea63dfacd44912d2b3 SHA-1: 6171dbaf9920dd2c8dd70d4ef029ce53fe85ad9d SHA-256: ec8ca8a9869611e1f685f1f018ef746ab8340ad9666ac75e7374c3a5ba221193
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, masquerading as 'free generators' or 'game hacks'. The primary lure, 'how-to-get-free-robux-without-verification-2021-game-hack', points to a URL that is likely part of a phishing or malware distribution chain. The document body, though partially corrupted, reinforces the lure with similar themes. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

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.online/app/431946152/how-to-get-free-robux-without-verification-2021-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/pubg-uc-usa_GM1330123889.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005462.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5462 29332 bytes
SHA-256: ac5aed08f90c7a5970e48551fbce748a9937caebf2034211df7ae7372120b75b
font_01_sfnt_off000095c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D3 19528 bytes
SHA-256: 1b346556c7df455cb9a54b8f1a6e3f1a0bfffa2d9228fa0640c35d2bdb9db684

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