Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbef0fffef837d2…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 19:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b67f5d3b767ae547eb11ae87d181f0fc SHA-1: ff59d02b2610677e8eb50965366b2d1b6a3700df SHA-256: 7cbef0fffef837d2c189c5fc39e43209e2c792a9572380131301461a9daf45b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, such as 'free-robux-just-click-game-hack'. These links are flagged as malicious redirectors, indicating a phishing or scam attempt. The document body and heuristics confirm the lure is related to popular games, aiming to trick users into visiting potentially harmful sites.

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/free-robux-just-click-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/delta-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-scripts-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/videos-de-como-hackear-cuentas-en-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-free-robux-hack-com_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-dll-hack-april-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-free-games-to-play-now_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_off00002e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E28 21684 bytes
SHA-256: 798629ac06dbae6a820ac61717837204fe19e191511f704445136bd475888c2c
font_01_sfnt_off00005e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 19348 bytes
SHA-256: 8163eefe55d2b716894bab3fbbbe5b67835ea43b9ee71dd429e67fe46c72f214

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