Malicious PDF — malware analysis report

Static analysis result for SHA-256 58eb081f9b11d632…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 16:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1c84e155e0015eda30ea58aec8662327 SHA-1: 812b5461d79a9642412ad60bad2eb70ad98fef8b SHA-256: 58eb081f9b11d63271f399722b9fb13ad48378024607f09a153467a250077c65
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links designed to lure users to malicious redirectors, masquerading as "game hacks" or "free currency" generators. The document body and embedded links strongly suggest a phishing or scam attempt, likely to monetize user clicks or lead them to further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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/406889139/master-free-spin-and-coin-links-html-m-1-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-talk-as-a-guest-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-roblox-jacket_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-robux-hack-really-works_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-items-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-roblox-using-cmd_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn macro / runtime command snippet
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/fIn macro / runtime command snippet
    • 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_off00002fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22876 bytes
SHA-256: ac5d4679c2d50d3f191f880fbbc9d2bcd83f6b3730030aed3de2c07d0709f514
font_01_sfnt_off0000637c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637C 18956 bytes
SHA-256: 85e071f9d2d9aba7decae53ba293d7c98952cf6adb5dc147492857e3bbfc39de

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