Malicious PDF — malware analysis report

Static analysis result for SHA-256 8757526d3aba90e4…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 03:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9b86edc7ed6b333bbed4cde5553f7c6e SHA-1: 1ed7652e012356c2e834f1af826cc543a6123423 SHA-256: 8757526d3aba90e40dca149eda7a2259ff0fcab90ffd07050eb4b1d030a1e1d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks and generators. The document body and embedded URLs point to a primary malicious URL that is likely part of a phishing or malware distribution chain. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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/roblox-welcome-to-bloxburg-for-free-game-hack In PDF document text
    • https://www.ak-oroslavje.hr/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-make-free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-hack-app_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/artmoney-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-images_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-roblox-2021-accounts_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/hoops-hack-roblox_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_off00003133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3133 21876 bytes
SHA-256: 3adb362bd43579f2a61d321c75483b637d4d99b1f1ce59f7f2390375b639fb95
font_01_sfnt_off0000619e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619E 19248 bytes
SHA-256: f082700585439904dd788b4d1616318a12ac81ea71fb4d71e172965085db1baa

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