Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad00e3bd803c15c4…

MALICIOUS

PDF

45.7 KB Created: 2021-06-07 03:47:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 23cf98f779f41fa8461cd1653d3b2bff SHA-1: 51eab004691aec5915ee2848cb7a990cb4763d78 SHA-256: ad00e3bd803c15c4f48f62bc46723eef734d6f64ae6a0b7b92eed2fa865e975d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, disguised as "game hacks" or "free items". The primary link redirects to a known malicious infrastructure. The document body, though partially corrupted, contains text related to Roblox and game hacks, reinforcing the lure. No scripts were extracted, but the presence of multiple malicious redirector links indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/how-to-get-free-clothes-in-the-catalog-on-roblox-game-hack In PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/pubg-uc-free-link_GM1330123889.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-without-verification-or-surveys_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
stream_004_off00005442.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5442 25508 bytes
SHA-256: 9fea75c2de2b851f2bf89e4f7b643f7aff86f21054d6f0cbe66c4b9feb40f7cb
font_01_sfnt_off00008e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 18900 bytes
SHA-256: 14541b96b9c580508f23ef5fa3a50af31578334fcb6614530d1bd134a1a66a8d

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