Malicious PDF — malware analysis report

Static analysis result for SHA-256 334de759fc3d4f62…

MALICIOUS

PDF

35.6 KB Created: 2021-06-25 20:45:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c79ca57b78f12d53d51eb3c671b6172d SHA-1: 6aba34a136d2ad54c8e3c7d626cef1a88057d20f SHA-256: 334de759fc3d4f62a285ad70e22fccf0759c28cd784dcdb05b248acc3543809a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators for popular games like Roblox. The document body and heuristic firings confirm the intent to lure users to these malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/infinite-jump-roblox-download-free-game-hack In PDF document text
    • https://www.itc-nekretnine.hr/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/tiktok-free-view-year_GM835599320.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/dance-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-codes-no-verification-2021_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_off00003194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3194 22268 bytes
SHA-256: bdbda76e78f2c73568158a7659503de9b00ddd57d447c3df05cd21729b2f723d
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 20120 bytes
SHA-256: 1efe9fad073b2d0d6cb504c6168810f054ab33f4932377e73a58ee3de77407d5

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