Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ccb4ef00475e28…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 01:14:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 01ed459338b7a8c10c4c9e4de788c0a5 SHA-1: 6cf5d3c5fa4edd861153ba41d2056e22957b0b88 SHA-256: 28ccb4ef00475e28d6208c3200ea7130df5554519a3fa4b4c089597e7718dbfc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/master-coins-free-game-hack. This redirector is presented as a 'free generator / game hack' lure, aiming to trick users into clicking through. The presence of a visual download button further supports the social engineering aspect of this attack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/master-coins-free-game-hack In PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-many-warning-for-cheating-do-you-get-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-van-candy-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-meeting-center-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/cheats-for-big-paintball-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/roblox-dll-hack-free-download_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://elearning.manlimapuluhkota.sch.id/__statics/gudangsoal/files/robux-boost_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
stream_002_off00003035.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3035 22972 bytes
SHA-256: e4e2b7039b350acca4145762f4a907a6631a83c8e061040bed8cb2b42244f8ca
font_01_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 17996 bytes
SHA-256: fa851caa7f63d89d5125b361ad8af841500573ce2358cce74b5d769b3240620f

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