Malicious PDF — malware analysis report

Static analysis result for SHA-256 affcfbd8155d7082…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 02:16:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6298dcc494915e9cc341c9429cd426cb SHA-1: a45de2ca15a365659476e56708a3d6a40c81be95 SHA-256: affcfbd8155d7082b2df52ea997940a89e7ea90df6d066bb737b54d7c42d763b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/479516143/how-to-install-minecraft-for-free-game-hack, which is associated with a redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack aimed at tricking users into visiting malicious 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.tw/app/479516143/how-to-install-minecraft-for-free-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-executor-2021-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/we-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-robux-obby-working-100_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-royale-high-free-vip-server_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pubg-uc-list_GM1330123889.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-cheat-download_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-colouring-pages-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/best-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-live-stream_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-regular_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robuxian-free-robux-website_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-cute-hair_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-bubble-gum-simulator-steal-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
font_00_sfnt_off0000328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328C 22436 bytes
SHA-256: 178de67b9ed7df6baa61988a190aabebb7456c96a96d0d241705889222d0cdb6
font_01_sfnt_off0000644f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644F 18236 bytes
SHA-256: 80f9f3d3ddf194f52a7f748b585b61cd03432ad9892c468e4e347190080fe4ef

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