Malicious PDF — malware analysis report

Static analysis result for SHA-256 1594884b1ab124f3…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 05:11:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dc9fe52dc419c391259363b0868956c9 SHA-1: 383aa21d5d077233b12f90a2020008e59cdb73c5 SHA-256: 1594884b1ab124f343d9b12338d1167f46d43ffe53a3c20e4ed6a76260c17a13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as lures for game hacks and free currency. The primary redirector URL is http://netcdn.co/app/431946152/jp-youtube-roblox-how-to-get-free-robux-game-hack. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/jp-youtube-roblox-how-to-get-free-robux-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/hack-for-roblox-ios_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/best-free-injectors-for-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-youtube_GM431946152.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
font_00_sfnt_off00002f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C 21664 bytes
SHA-256: e02a8decc4a33c6dd34135e7de7d7853dbe46ac39f0484b715d7d2b4a4aef743
font_01_sfnt_off00005f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 19564 bytes
SHA-256: 52eb1aba23a1d0117506a486e95285171859a11ed44a248cc5d2d4e054641572

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