Malicious PDF — malware analysis report

Static analysis result for SHA-256 53be2c82e5812e83…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 00:18:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a31ec9711c00e1ecac7e6be970d972a2 SHA-1: 1cc92517ec338818f2fca5f14f4489f635f8b3aa SHA-256: 53be2c82e5812e831300108aefc6c4da06845453837ac860bb37ac317891a9ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links, including one identified as a malicious redirector leading to a 'game hack' lure. The document body and heuristics indicate a deceptive attempt to trick users into visiting malicious infrastructure, likely to download further malware or exploit vulnerabilities. The ML classifier strongly supports the malicious nature of this PDF.

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/play-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/tiktok-free-like-and-followers_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pastebin-robux-hack-accounts-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/sans-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-accounts-bugmenot-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-demo_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-adopt-me-pet-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-a-hacked-account-on-roblox-back_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-fashion-frenzy_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacking-someones-account-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hacks-scythe-script_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-5-million-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-hack-no-buying-apps_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-gamepass-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/installer-un-cheat-roblox-pour-avoir-largent-illimit_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_off00003458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3458 21740 bytes
SHA-256: e514768b3599087c1d036576a896a2d8a8e2aab09e41f86bea7e08963663ce67
font_01_sfnt_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 18752 bytes
SHA-256: 1c750ae825fc9a886ea70e83678fe12c2f590e2b55fff129ba454ba43f005414

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