Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ed2d796789b5f2…

MALICIOUS

PDF

46.0 KB Created: 2021-06-10 17:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 12c38383eb091df60fe4f7b2d4d09894 SHA-1: 74f8bf1ecc34b6428ebda58cfbc16d45b7f25b54 SHA-256: 27ed2d796789b5f25af3d83576084bd0adcb7f11fe3794cd6f7af5d814811d2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games. The primary malicious link identified is https://netcdn.tw/app/431946152/see-players-through-walls-hack-roblox-game-hack. The document's structure and embedded links suggest it is designed to lure users to malicious websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/see-players-through-walls-hack-roblox-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-gen_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_004_off000050bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BF 26196 bytes
SHA-256: 62ab34063dabb2e9813ef801cd27b88f8cfa6f1818e65db1a2ece2393befa090
font_01_sfnt_off00008e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4B 19308 bytes
SHA-256: 6337a92bc288dd3b3f16f4d5d266bff7de331306b4d2f52b72fa2175b3475c30

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