Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04c83d4f6dc7543…

MALICIOUS

PDF

43.9 KB Created: 2021-05-10 17:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e8f7d788291d8d488f3bdce415df8be6 SHA-1: bddc5667e75c3222db4dfbef276eb6d69a24f8a4 SHA-256: c04c83d4f6dc75435934c1f5ce7b705141325667c8803d539b28a1f60d46338c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and domains hosting game-related lures, such as 'free bobux' and 'free robux'. These links are designed to trick users into clicking them, likely leading to the download of further malicious content or phishing pages. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/free-bobux-game-hack In PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-generator_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-speed-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
stream_003_off00004981.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4981 28636 bytes
SHA-256: 42b1c6846b1a5c1df8c3df41199bfafea912c1b53f3eb7a9fa71380bb3ab4190
font_01_sfnt_off00008a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A15 18012 bytes
SHA-256: 21a070aee0b4453f2f1d9cb5d53691f71c1a468eb04f2ae46e30da6bacbd91e9

Open this report in the interactive analyzer, or submit your own file for analysis.