Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbd008c29008825…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 19:09:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: facdc9e49808a7d525fe746cfeb9b000 SHA-1: f31d0968397df67dcd4f4fa21145b353f807ae3e SHA-256: 4bbd008c290088256a9178e0e30e166ddc6395186067a283c1cad3de2c330e34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux and game hacks, directing users to a malicious URL. The heuristic firings indicate the PDF links to known malicious redirector infrastructure and is flagged by an ML classifier. While no scripts were extracted, the document body and embedded URLs suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

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/free-robux-without-verification-on-ios-game-hack In PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/robux-hack-100-real_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/robux-best_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-spin-link-new_GM406889139.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_off0000301f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301F 21632 bytes
SHA-256: ea4b3d3b4e57ae991ce530800b240fdfc50a2e145d2c8ee9aaa908b0b0f188a6
font_01_sfnt_off00005fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE4 19436 bytes
SHA-256: 8795776b17b3a8972f2eaf9c9354749fca6b783c40b2322d7ecd5b360a0628d4

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