Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa71618a25fcbd8…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 03:37:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dee70343a56c381dafe62760d321b234 SHA-1: aa69b179dc31ff07eae6fefac5416403a6bfe010 SHA-256: 6fa71618a25fcbd821574598be930162a378632d3bee67e78b6d7ed78e28d0d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-hack-without-verification-code-game-hack. The document body and embedded links suggest a lure for game-related cheats or hacks, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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-hack-without-verification-code-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hack-para-cambiar-tu-nombre-en-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/real-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-online-game_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-account-v3rmillion-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-unlimited-free-spins_GM406889139.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_off00003238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3238 22820 bytes
SHA-256: 06f399953e9faef2404d930a2fbebfd3d7a94cb0592a4ed3ab98f6190e77de80
font_01_sfnt_off0000656a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 18816 bytes
SHA-256: a9e0a618903bb392e01413f9b152c22796f511f28b171904dea730d40abc975b

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