Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf1dff0c3253e08…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 02:45:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 18caaa761ac9119ea8496a49eb8f9cfc SHA-1: 5a07677f54447f5f0e0da60f1ae1fc17345717ce SHA-256: 2bf1dff0c3253e082e920482aef8e2c13877837ce2e2b7eab153ca4942ca73fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The heuristic firings confirm these links are associated with malicious redirectors and a lure for game hacks. Although no scripts were explicitly extracted, the embedded URLs and the nature of the content suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-lab-experiment-hacks-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-boku-no-proxo_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-gift-card-codes-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/csgo-roblox-hack-sc-ript-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/dansploit-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-100-works-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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22304 bytes
SHA-256: 751e03458b571438d657b039d0f330b53d6890b8282979981659578211d15eea
font_01_sfnt_off0000605d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 19316 bytes
SHA-256: ae15b8c77d8b6abacde3391fb0cf1e83c07f6c6ea953ec3b15d1a9bc6f7b1204

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