Malicious PDF — malware analysis report

Static analysis result for SHA-256 136ca2b9ed236453…

MALICIOUS

PDF

36.1 KB Created: 2021-06-19 23:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ea1b39768dc9827821cd94bbc2b7e31b SHA-1: be9a6db9508a53702a129dbddba89a5aa9d7a092 SHA-256: 136ca2b9ed236453a201e9f2c5f9103b5f4fc5d053772ab9bbfc90d94d27f8f9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/destroy-walls-in-roblox-hack-game-hack. The document body and heuristics indicate a lure related to game hacks and free items, designed to trick users into clicking these links. The presence of an IP literal in a URI further suggests a malicious intent to obscure the true destination.

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.co/app/431946152/destroy-walls-in-roblox-hack-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/giveaway-free-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-hack-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/checkmein-free-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-clothes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-stuff-in-catalog-roblox-2021-nick_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cruise-ship-tyccon-albatros-free-script_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-2021-admin-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/10-ways-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/synapse-x-best-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/sentinel-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/make-a-shirt-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-verify-2021_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_off000032c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C6 23220 bytes
SHA-256: 536278c4f21f399a012440825182f7f1300d69d19a87888d3bd2ec66937d78d3
font_01_sfnt_off0000671b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 19308 bytes
SHA-256: 32e6750f3a57c6c08e03bf9056857c09eac750d133a5bbd0490c2f2d0350e0d0

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