Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a08826489e0c3c1…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 04:23:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 14312191494d06a1ac123f18c7d9660d SHA-1: 1afa988a996a2ba0d6877d40d8bf5ae85362e0d6 SHA-256: 5a08826489e0c3c1b6d53bff748e41f13ce939a492726c02ccd5ad25f63aedf2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game hacks, specifically mentioning Robux, and includes a link to a known malicious redirector. The document body and embedded links strongly suggest a phishing or scam attempt designed to lead the user to potentially malicious websites. While no scripts were explicitly extracted, the nature of the lure and the redirector indicate a likely attempt to download further malicious content or phish for credentials.

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.tw/app/431946152/how-to-get-free-robux-hack-game-hack In PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-catalog-roblox-hack_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/quiero-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/how-to-get-free-robux-dec-219_GM431946152.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://itamleek.net/uploaded_files/userfiles/files/hacks-for-phantom-forces-roblox_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_off000030e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E8 22484 bytes
SHA-256: 2d470e700dc2f9743ad53cd8974d57f461e8dbbfe595f2de5c0b2bcae59ca6d3
font_01_sfnt_off0000630e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 19152 bytes
SHA-256: a9bff55de90b7722e0be476df1c7a65da1171d9638b3b21a902752e59eae7e63

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