Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c82b188aad16307…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 17:47:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5ba6332665fa6c230a9b4075c3762216 SHA-1: 25c3bd7811c7ccb14930467a8294e69b736a451f SHA-256: 3c82b188aad163075b7a9098068b8ce21f8471d16af1a3e8aa389029345e5144
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links and calls to action that promise free game currency or hacks for popular games. These links, such as 'http://netcdn.co/app/431946152/clothes-for-free-online-roblox-game-hack', likely redirect to malicious websites designed to trick users into downloading malware or revealing personal information. The ML classifier and specific heuristics for game hack lures strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/clothes-for-free-online-roblox-game-hack PDF link annotation
    • http://www.ocic.hr/files/wwwget-free-robloxcom_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/free-spins-coin-master-links_GM406889139.pdfIn macro / runtime command snippet
    • http://www.ocic.hr/files/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/hair-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/filesIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off00002ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAD 21512 bytes
SHA-256: 0225919cc27088b114d81b3b69feb7a0f70d11ccd7a6484359f807e403cdb971
font_01_sfnt_off00005dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBA 19040 bytes
SHA-256: 4bdb8034caafca92e711e3a610a360f17638ac4f22bb82476e6b1b3dd91850bc

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