Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf1307e047f071c…

MALICIOUS

PDF

54.2 KB Created: 2021-06-03 23:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8ef68100c576b8b35e3f98d082fbccaf SHA-1: 6823a21aed7d5a5de5579f54f3d8236d3dce8659 SHA-256: 3cf1307e047f071c473e7f192f1d9b5735da7cc599bb42509a2258236078375b
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 'free generators' and 'game hacks'. The primary link, https://netcdn.online/app/431946152/free-robux-no-human-verification-and-no-survey-game-hack, is flagged as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9491

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 https://netcdn.online/app/431946152/free-robux-no-human-verification-and-no-survey-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD1 31508 bytes
SHA-256: 88bd27f1d9b0f089a941995c33c5e9da6479d698d4e8ab35ca5dbfed5f5d6010
font_01_sfnt_off000096ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AD 2956 bytes
SHA-256: a530421623e70354e146bf04bc33db78ab843f6c4cb4112fd8f69eabf96910cd
font_02_sfnt_off0000a0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0CC 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000adde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDE 19328 bytes
SHA-256: d2b84e9593d62b74a5e72ac2cd252f85880eba3e829d4f4451320fa49886136c

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