Malicious PDF — malware analysis report

Static analysis result for SHA-256 45033ce7279df824…

MALICIOUS

PDF

32.2 KB Created: 2021-06-28 12:20:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a60a9003d906fecd48ea7aa49d752c94 SHA-1: 43c3bd642549dff68aa7cac65f82300971f34b3a SHA-256: 45033ce7279df824a7a14924976e70952259f50362262bf42809e70bea1d2279
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK firings indicate that the primary purpose of this document is to lure users into clicking these links. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to harvest credentials or lead to further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/pin-robux-free-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/robux-website-hack_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-gold-cards-coin-master_GM406889139.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://www.3d-gold.com.hk/upload/files/gain-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/phantom-forces-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-hack_GM431946152.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_off0000291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x291B 21872 bytes
SHA-256: 8c16505794afd639584faa30f621d16ff0ea4ea566b20d69962f90348a72f9b7
font_01_sfnt_off0000593d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 18992 bytes
SHA-256: 7489bdabbd235040593ef096b9f3dceb7d05d5654bf249ee31938b2c8a0060b1

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