Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea2156fa8cc4dee…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 15:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0bfb725b1ed7bce11d8bb7f0a4f39228 SHA-1: 9b5445d1c12a24cd5428eb923552c7a61a901a08 SHA-256: aea2156fa8cc4dee620bcf812bf28e2550461d55ea17fc3f533414c60549566d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-fan-page-free-spins-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or currency, aiming to trick users into visiting malicious sites. No scripts were extracted from this sample, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or redirection attack.

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-fan-page-free-spins-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hacked-games-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-tix-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/web-robux-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/criminal-vs-swat-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/www-roblox-robux_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_off00002f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F46 23224 bytes
SHA-256: 18e405d8694e4463ec445e0418e5c86de5ebac070186adbcb00d5bf1cae076e5
font_01_sfnt_off0000634d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 18328 bytes
SHA-256: fc07e399d569c9cb0326c2788f4b655073573cb4c501715abae06525b94755db

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