Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd56fd94400cf166…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 21:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4253ddf3c560c594c117b5c30f4613a1 SHA-1: 192abaad584d796c0413e52493b53cdb651a1372 SHA-256: fd56fd94400cf166718468093eaba63f16a24124c4186d81343b4e8e248e9575
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/best-free-robux-obby-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacked-roblox-shirt-forums_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-become-a-admin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-penguin-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-roblox-being-hacked-right-now-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA0 22456 bytes
SHA-256: fc4600c4a637cd777c8d4ee45aedab208a0daa460fb05d2c59c9a35d5171af21
font_01_sfnt_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 19000 bytes
SHA-256: 1117ece13bdf9fad62db393b3ef9d129524eb3cffa686cddbaec0ac91a6ef85d

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