Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8673c9badbef3e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 07:53:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 584eaa7af9cbee36fb34e35d01341046 SHA-1: 7e408c3105987d39f7704d4d95767fb1015dcdd8 SHA-256: 6b8673c9badbef3e7e7dbe7f767d5b20db39bdb50e62f3a99ba3a75ba2b319be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, specifically advertising 'free generator / game hack' content. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs and the heuristic firings indicate a phishing lure designed to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

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/479516143/minecraft-free-reddit-game-hack In PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-download-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/roblox-com-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-hack-on-roblox-windows-10-hp_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/yt-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-roblox-bot-account-dump_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
font_00_sfnt_off00003360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3360 22316 bytes
SHA-256: ff9c6b8a96c080e9aec34df7a9a623dc129dc8f82c76c3ee03f11b851b6a536a
font_01_sfnt_off000064ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 18028 bytes
SHA-256: 643495630a0e2882763c76801d421163758b25dda5a584bed505c907634fa296

Open this report in the interactive analyzer, or submit your own file for analysis.