Malicious PDF — malware analysis report

Static analysis result for SHA-256 c917253ced6c7e54…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 08:57:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5ea9210937450b5272fca8795906ac97 SHA-1: fd886953c76394ca703137d67c226e81d6b58cc8 SHA-256: c917253ced6c7e5484d37052b110276db7047be8482a5df13c7c1c829f8c1c67
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text that explicitly lure the user with promises of 'free generator / game hack' and 'Minecraft Free Ios 2021'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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-free-ios-2021-game-hack In PDF document text
    • http://ghi.dk/billeder/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-comcom_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_004_off00005169.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5169 27056 bytes
SHA-256: 8bf9b54a5e07b06e321ff977b06e689a4da8e1266f705d953c412ac36cbc5c79
font_01_sfnt_off00008d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D18 3020 bytes
SHA-256: 82094c1c2c307350588ed099435acf79ed0e6609629770eaae9bb60435181c89
font_02_sfnt_off00009786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9786 18112 bytes
SHA-256: b55c1404a277e69c847ae3cf6ace6563469f03eb0031cfae1db94f462975a683

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