Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5407afadc65a58…

MALICIOUS

PDF

36.7 KB Created: 2021-07-05 02:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 65b21b6c004017a64998488de6449384 SHA-1: 19d3ba822b967e0d1405aa3b3dec0cbc5c45d142 SHA-256: af5407afadc65a58453667b1cb06b4de95ca65b293aea2e396c24b47224814f4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure and another to a raw IP address. The document body and embedded links suggest a lure for game-related cheats or free items, a common tactic for distributing malware or conducting phishing. The presence of embedded URLs and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-free-spins-and-coins-link-blogspot-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-training-free_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-hack-robux-420-apk-az_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-2021-legit-working-100_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-roblox-skins-editor_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/pastebin-robux-promocode-hack_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-fast-and-easy_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_off00003856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3856 22772 bytes
SHA-256: beb8f9937e0f84a919d9dff94af3e0abf1e015ef21d0e9a4752332f3ca2e8daf
font_01_sfnt_off00006b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 18808 bytes
SHA-256: c1f494af37efa3c19b76a788520f3f9c15a1a81de3f38337c7b875dc57d79974

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