Malicious PDF — malware analysis report

Static analysis result for SHA-256 b186bbe6f5071f2f…

MALICIOUS

PDF

31.6 KB Created: 2021-06-10 21:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a31c44c2e323aaeb88318bc107e8d5be SHA-1: f9ebf75c704952d4497b9f949200576d7f3215ee SHA-256: b186bbe6f5071f2f7a3c1ebf5caa6ec1a7ea0287c06f17ece99797bafe07eb4a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as "game hacks" and "generators". The ML classifier strongly indicates maliciousness, and the embedded URLs suggest a phishing or scam attempt. No scripts were extracted from this sample, but the document's structure and embedded links are indicative of a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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-hack-for-robux-kredi-kart-game-hack In PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-lua_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55D1 15314 bytes
SHA-256: 928ad95508d24d37320506c7675e08ccafeb32b3ab7fb4c832691b9f92882002

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