Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c576671709b3bbc…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 11:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ade0d78b582777f0e0f3c7e7c5427828 SHA-1: eba3d4cfbdd5ab6192dbd4ba749a19cbe389b904 SHA-256: 2c576671709b3bbcd14fffd9753e2c878c8834e18d8eea8f8e53805a7d6fc0e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary link, http://netcdn.tw/app/479516143/minecraft-free-ios-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a social engineering attempt to trick users into visiting these malicious URLs, likely as a precursor to further malware delivery or phishing.

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/479516143/minecraft-free-ios-game-hack In PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-account-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-a-roblox-redeem-card-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/earn-free-robux-game_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/the-streets-roblox-exploit-free-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/how-to-get-free-followers-on-tiktok-fast_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1smg.sch.id/__statics/gudangsoal/files/roblox-number-to-get-free-robux_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_off00003544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3544 23080 bytes
SHA-256: 0bb68306fc72028ad21043a025332f1e62c415f8923696263eec5abf7a49bfcc
font_01_sfnt_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 17996 bytes
SHA-256: c69302d64d01fed68f7faa121aa3d2ae3c207c1a6baca3325fd70ae8fd84539d

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