Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b18ea44c0827ee…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 00:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6e3b5b725c454c3168116bef7d7f6aa9 SHA-1: 6b3001b1f2def16730cf3bf156463edca6dc19d7 SHA-256: 90b18ea44c0827ee8e080f87f6464aa821965f3a8ee86ba08ce5ad9297b02a21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/get-robux-com-game-hack. The document body and heuristics suggest a lure for game-related cheats or currency, likely intended to deliver a second-stage payload. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or 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.tw/app/431946152/get-robux-com-game-hack In PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/wurst-download_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/op-roblox-hack_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/hackear-roblox-escape-prison_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/3-ways-to-get-free-robux_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_off00002d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D23 23140 bytes
SHA-256: 015fb9eb3f958607142954d777b7715c576d28fb09dbe0a445d447301431fbc7
font_01_sfnt_off00006163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6163 18916 bytes
SHA-256: c2efe05e9d2138b719f685e0e190c44da44493e238d9fd68d8d9349a0cba08af

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