Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b5c9e03077fcfe…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 00:45:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6c276738f7f7f96d39b1a3d9643bf12f SHA-1: d885d8c99e491fe6b309c03d1f6ef2b85e68a508 SHA-256: a6b5c9e03077fcfe5bba276ad2eb3f4d21bf2a30fecba3b75a79aac455404c9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-daily-gifts-game-hack. The document body and embedded links suggest a lure for users seeking in-game advantages, which is a common tactic for distributing malware or leading to phishing sites. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a malicious intent.

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/406889139/coin-master-daily-gifts-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-for-roblox-pc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/generator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-android_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robloxcatalog-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/yahoo-games-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-2021-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/speed-hack-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-engine-undetected-roblox_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_off000031ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 23300 bytes
SHA-256: 2692c0aa3980698b764fca15c7397d772a0ffdc2df0c1f53dd001d9df7388340
font_01_sfnt_off00006662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6662 18256 bytes
SHA-256: 9a57ad812e157e436bcc4047eb8b4adcab852283a97400467038476e1586e01e

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