Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba829156d85293b…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 21:14:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 229288770d96b13a4b2d54d66caf3881 SHA-1: 709fdc1a97d1587034f11da22d7b79be58f9fde6 SHA-256: 0ba829156d85293b43e53a696ecf83097fe4ea968ae9e18f05d59820434ddf28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, directing users to a malicious URL. The document body and embedded URLs reinforce this theme, suggesting a phishing attempt to lure users to a potentially malicious site. No scripts were extracted, but the PDF structure and embedded links indicate a malicious redirector is the primary function.

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/can-you-get-banned-for-cheating-on-private-server-roblox-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/pokemon-go-free-trainer-codes_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-millions-of-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/shredder-machine-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spin-group_GM406889139.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_off00002f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F96 21796 bytes
SHA-256: 172c596ce2533386461413f3a5ab481137496a1620dd9bd3626a0b56ef0c8e30
font_01_sfnt_off00005f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 19784 bytes
SHA-256: aa37ab8eed4b83e9bbfbd5efc1197dbcf603c142351a72c7c00b0946304a881f

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