Malicious PDF — malware analysis report

Static analysis result for SHA-256 517d63ff2007f9df…

MALICIOUS

PDF

46.0 KB Created: 2021-05-12 13:36:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cd14d74547383a532d8c7648baf3ac56 SHA-1: 6ae111d7908d2b157a91d4322840eadd2a6be1df SHA-256: 517d63ff2007f9dfc7df6b072e0b62d543612d242622465d886ffd19df959f24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game items, likely leading to a phishing or malware download site. The presence of multiple redirector links and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/free-spin-coin-master-link-2021-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/www-roblox-com-robux_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C6 25020 bytes
SHA-256: 8da6121c3abcb41ef6c3407147f41c306bf7c1814bbc456b3f23628cfba343c2
font_01_sfnt_off0000830a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830A 4068 bytes
SHA-256: c62008988e4b902bb5c12d8d3cc05acd39277c3eabdfe68838055c4156cec1ae
font_02_sfnt_off000090b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B9 18456 bytes
SHA-256: e9900cc34792e9e10189734f2c0a95be85fa7d2c8d6cb23872c5da80ce816735

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