Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9bfb39e94852085…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 02:21:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bbcda65da2ddacb23818731402025346 SHA-1: a2569935d7fb13cef4e557dcdb8b3208df884f6c SHA-256: e9bfb39e948520853db355b2aa34beb9e6ab90e7fc76a130a9ac777f83beb8c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting game hacks and generators. The document body, though partially corrupted, contains a URL that aligns with the malicious link findings. The presence of these links strongly suggests an attempt to lure the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

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.online/app/406889139/how-to-win-attack-madness-in-coin-master-hack-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/proto-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-generator-2021-download_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-114-4-download-free_GM479516143.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_off00004fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC6 25456 bytes
SHA-256: b6abf469858ab67fc5008c2b1c8f2519139ef29ed6e76c91b10a8470662c9aa6
font_01_sfnt_off0000895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 18252 bytes
SHA-256: ebc75091247f42f4d8f6f5328204ee4b219dff7698097371fec03a0e52319ffd

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