Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b7f9a853ce9c3d…

MALICIOUS

PDF

50.9 KB Created: 2021-06-03 09:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6a645ac7366ff2d0d378a663679bc4f1 SHA-1: 404685cb77557db20e35ae89baec219dbfdfff08 SHA-256: 26b7f9a853ce9c3da269440334598a83535d7b10a197783b6e1c146c4b6a4ecd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary link identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Minecraft For Macbook Free' and a 'game hack', aligning with common social engineering tactics. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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.online/app/479516143/minecraft-for-macbook-free-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/pokemon-go-no-free-box_GM1094591345.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/tiktok-free-vs-premium_GM835599320.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55DE 25128 bytes
SHA-256: b3e7beb0809da15a84a7e7696182c4ee9f4d35d984567802b3a649b8e4a1aad2
font_01_sfnt_off00008fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD8 3196 bytes
SHA-256: 7c26f932ded464a2d3c92088262e55ec5165d39ff8bcf3606cfbd06955f12d00
font_02_sfnt_off00009aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEA 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FB 18040 bytes
SHA-256: e35cfce22191ce4ea9e8e8a795a10ede178e5487c7a13e4e7778456c2803af03

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