Malicious PDF — malware analysis report

Static analysis result for SHA-256 da87507c6aadf0f6…

MALICIOUS

PDF

33.5 KB Created: 2021-06-19 01:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c405d28c9880ca5ef48c71564b7c3d37 SHA-1: 2c1d82215d0d85f2e3cefb992b25e7a184954d87 SHA-256: da87507c6aadf0f64577c30a24f08fcaf9244ea93e66f6b6e03602bfa70cd32e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to websites offering free Robux and game hacks, with one link pointing to a known malicious redirector. The document body and heuristics indicate a lure for potentially unwanted or malicious downloads, likely delivered as a spearphishing attachment. No scripts were extracted, but the embedded URLs and redirector activity suggest a download or exploitation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-robux-mr-robux-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-hacks-download-free-dll_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/free-robux-easy-just-username-and-then-get-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hacks-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-piano-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/phantom-forces-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-download-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-real-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/wearedevs-roblox-fly-hack_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_off00002e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E66 21728 bytes
SHA-256: 5e4806113593d345847e9f04fd2e390b3fb6f8c491219b0953cc687e9b4a69bf
font_01_sfnt_off00005e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5D 18912 bytes
SHA-256: f9b32ba6aa095a9de3495850bdf943af8b16f14d2b8a9638f1c0003dabb01306

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