Malicious PDF — malware analysis report

Static analysis result for SHA-256 027f778b426418f5…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 12:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 125025c90cbe4c4a8421f99d19d7e72b SHA-1: a12cc21654ff6c6fafd2cfa513fdab4a3d480d61 SHA-256: 027f778b426418f538368c7226dbc24d14191dba7973a919fdadb3af991736b3
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits malicious behavior by presenting a fake CAPTCHA and embedding numerous links to game hack generators. The primary malicious URL, https://netcdn.xyz/app/406889139/coin-master-gold-cards-hack-english-game-hack, is flagged as a known malicious redirector. The document's content and embedded links strongly suggest a phishing or malware distribution attempt, likely using a social engineering lure related to popular games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/coin-master-gold-cards-hack-english-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/robux-games_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/is-minecraft-free_GM479516143.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
stream_003_off000048aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AA 24408 bytes
SHA-256: 1a7b199e45141b7db973ebdf719e3c2ccc0998c79aa90420c363cf18780f89d7
font_01_sfnt_off000080aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AA 18420 bytes
SHA-256: c747b30c55f11957bbcc45eb80d86fe9f42e29935af208c56b804fb4c299f143

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