Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f18b84e63356a5…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 23:06:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 74a4fcde77162a386227d31786fdfd5b SHA-1: e76859767d2dec7d757fd42a4e12898d6910caf1 SHA-256: 53f18b84e63356a5f16377d0892af89e2afe9da38b22ec4951f9ba9072975078
160 Risk Score

Malware Insights

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

The PDF document contains multiple links designed to lure users into clicking on them by promising free in-game currency or hacks. These links redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves social engineering to drive traffic to potentially malicious sites.

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.co/app/431946152/free-robux-accounts-2021-game-hack In PDF document text
    • http://ordineingsa.it/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/how-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/pastebin-robux-hack_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-ultimate-cheating-gui_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-lvl-7-hack-trial_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-build-a-boat-for-treasure-new-hack-unlimited-money_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-free-tiktok-hearts_GM835599320.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
stream_002_off00002f2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F2F 22680 bytes
SHA-256: 002f2c4bc6ab92ef78ad71dd9d0e5fb18733fddb4769a4af800fa99365de1564
font_01_sfnt_off000061d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 19224 bytes
SHA-256: 156e97e656f4bb783494abd7ae53ecfa8912a458841a7d4a142d29130362a46d

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