Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3209a943df581ac…

MALICIOUS

PDF

45.2 KB Created: 2021-06-07 11:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 423bc5a5cb2408b8b11a18735ac26717 SHA-1: 51ab87981509ebd305c6002efd42ca0b377b4401 SHA-256: c3209a943df581ac15cb1b88fe674fc53d53d638de29ab4dbd99e852a7c4b443
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be game-related hacks or generators. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely intended to lead users to credential harvesting pages or further malware downloads.

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/roblox-group-free-clothes-game-hack In PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-lovenet_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_off0000533d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533D 25132 bytes
SHA-256: 679587ecb5f99006c24dc01aca2d506bf636891a9f4a1a666f5bc0197a1b57c0
font_01_sfnt_off00008d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5F 18532 bytes
SHA-256: 7c7f38464deec2c2322812c61ee01eb4332c254dc7538cdec01afedf916299c6

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