Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27b8a9029957192…

MALICIOUS

PDF

44.6 KB Created: 2021-06-02 06:04:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ef7e5ca05724f0737259951503682a39 SHA-1: 8844d1982f1d1889fa4893cb80c26f968d0d2d54 SHA-256: f27b8a90299571928a8eea94e28343f035222dc443ab6676bc4a1aae3dbdf7c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to redirector domains, including one explicitly identified as a malicious redirector for 'game hacks'. The document body, though partially obfuscated, contains references to 'Minecraft Name Tag Hacks' and a URL that aligns with the heuristic findings. The presence of embedded links and the nature of the lures suggest an attempt to direct the user to malicious infrastructure, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.xyz/app/479516143/minecraft-name-tag-hacks-game-hack In PDF document text
    • https://gigbagwinkel.nl/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-online_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://gigbagwinkel.nl/images/how-to-get-free-hair-on-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
stream_004_off0000532c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532C 25512 bytes
SHA-256: 6726637e65d3e4d694297fdf68554a1c217c527767268d9dc919c44ef3479df5
font_01_sfnt_off00008c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C08 18288 bytes
SHA-256: eb7ed4260d6d64c3cd9f3242d6af3157cea31df7eff6e4be90ec8e6c005c47d1

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