Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6decd4b6fc01425…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 03:32:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 84348b1b7185f4adedcc3d5e4e35566c SHA-1: dc660432224c6e3c7ff2ec2a77e2fc17e32b0b02 SHA-256: f6decd4b6fc01425168a2c76fbd4042bcd9e21e22a10cf534deced7ac8f973a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game items and directs users to a known malicious redirector URL. The embedded URLs and document body content strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • https://www.itc-nekretnine.hr/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-free-hack-no-human-verification-2021-windows-10_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-to-hack-robux-using-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/robux-tv-hack_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/anti-hack-plugin-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-get-free-bc-on-roblox-pc_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/easy-robux_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-pe-free-ios_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D7 23052 bytes
SHA-256: 516fa17b76d65274dc08ced6eafcada8c5c499848e3db1a49ad23f6594936af0
font_01_sfnt_off00006678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 18512 bytes
SHA-256: b5acc537c59d1b7fb5e9a8b7451230baa0910c2ee96a0f773c75b2c56351fbac

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