Malicious PDF — malware analysis report

Static analysis result for SHA-256 0234cbb962b0959e…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 23:03:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8b630c2579456e14f9f09e3e1f913c3c SHA-1: 007236ca26827b7d870933219f4a121702f3a7e2 SHA-256: 0234cbb962b0959e755b82fce3144b17f6b2db1d555559087113c8dc6725ca99
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/coin-master-heaven-free-spins-link-2021-today-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-bloxburg-hack-script-pizza-delivery_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-fix-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-unlimited-free-robux-on-roblox-2021-jefftec_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/tiktok-free-recharge_GM835599320.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-in-ice-mountain-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-cheats-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spins-and-coins-coin-master-link-2021_GM406889139.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_off00003291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3291 22348 bytes
SHA-256: 9985678b6d412d8243b040519b1718be6afaec4d03fbfac06de87017739ffdf2
font_01_sfnt_off00006425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 19212 bytes
SHA-256: 9018d35b6adb957a15f04eb7ee50f2e08deef9d1fc1ef5103f9c1835f7b196b3

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