Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04c50dc252a3385…

MALICIOUS

PDF

47.3 KB Created: 2021-05-13 06:34:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8a44ac08975cc768897711fefd87cb36 SHA-1: 70f3fde8d661c87e76357aca5068ea7085840e06 SHA-256: b04c50dc252a33855fcfdc0ddc5923b2e8c8f3931c6aa127d6ec8532ca3d0568
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising free game currency and hacks for popular games like Coin Master and Roblox. The primary redirector URL is https://netcdn.xyz/app/406889139/get-free-spins-coin-master-2021-game-hack, which appears to be part of a chain leading to further malicious PDFs hosted on kendo.gr. This indicates a social engineering lure designed to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/get-free-spins-coin-master-2021-game-hack In PDF document text
    • http://www.kendo.gr/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/robux-today_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://www.kendo.gr/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/robux-xyz_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.kendo.gr/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.kendo.gr/images/free-spins-coins-coin-master_GM406889139.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_off00004be3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE3 24688 bytes
SHA-256: a75a65e31e0b356eb85efdeaea2f9f19dd2ad1a7c6b5e12da092ab0bbedfb59e
font_01_sfnt_off00008457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9670 18288 bytes
SHA-256: b38ddf3080d7f2bc752da259c3b03eae0df146b085052c6419baf797dcf0dadb

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